JP2728606B2 - Automatic volume control for automatic performance piano - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic volume control device for an automatic performance piano.

[0002]

2. Description of the Related Art An automatic performance piano controls a volume, that is, a sound intensity by changing a velocity (keying speed) by a driving means provided for each key. Normally, an automatic performance piano is set at a volume corresponding to a predetermined velocity before shipment, and when performance velocity data is read from a floppy disk, each key is adjusted to emit a predetermined volume according to the velocity data. ing.

[0003] When an automatic performance piano is used or left for a certain period of time, the key may not be able to maintain the volume corresponding to the initially set predetermined velocity, and the volume may change. This may be caused by deterioration of components constituting the key, deterioration of driving means for driving the key, and the like. On the other hand, the degree of the change in the sound volume is slightly different for each key depending on the use conditions and installation conditions of the automatic performance piano, and all keys cannot be corrected with a fixed correction coefficient.

Conventionally, such correction has been automated by creating a correction table for each key.
For this purpose, it is necessary to provide a hammer position sensor for each key, which has the drawback of increasing the number of parts and the number of manufacturing steps due to an increase in the number of parts. In order to solve this drawback, Japanese Patent Laid-Open Publication No. Hei 3-98093 discloses that each key is driven by a preset drive signal, and the sound generation timing at that time is determined.
The reproduction performance information detecting means detects the sound stop timing and the sound volume, and calculates a deviation of the relationship with a predetermined keying force. Has been proposed.

[0005]

The relationship between the velocity and the volume is not that the volume always rises proportionally as the velocity is increased, but the velocity-volume correlation diagram before the deterioration of the key of the automatic performance piano. (FIG. 11
As is clear from (A)), even if the velocity is increased, the sound volume does not exceed the limit value La because there is a limit value La determined independently of the velocity. On the other hand, FIG. 11B shows a velocity-volume correlation diagram when the key of the automatic performance piano is deteriorated or when the distance of the piano sound detecting means is far from the automatic performance piano. As is apparent from this figure, it is impossible to achieve a sound volume higher than the limit value Lb by correcting the velocity.

For this reason, in the keying force correction device disclosed in Japanese Patent Application Laid-Open No. 3-98093, the range in which the reproduction performance information detecting means can be installed is limited to the vicinity of the piano. Further, even if the reproduction performance information detecting means is installed near the piano, it may not be possible to reach a preset volume level due to deterioration of the key.

On the other hand, when listening to the performance of an automatic performance piano, depending on the components of the piano, the structure of the hall where the performance is performed, the material of the wall used in the hall, and the like.
Even if the balance of the volume from the treble to the bass is optimized near the piano, the volume balance is disturbed as a whole in other places, for example, the bass is considered to be relatively lower than the treble. Was there.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide an automatic volume control device for an automatic performance piano which can adjust the volume balance for each key at an arbitrary listening position.

[0009]

In order to solve the above-mentioned problems, an automatic volume control device for an automatic performance piano according to the first invention is based on performance velocity data of each key as illustrated in FIG. Reference level storage means M1 for storing, as a reference level, a predetermined volume of each key with respect to a predetermined velocity set in one or more stages, in an automatic performance piano for driving an automatic performance by driving a driving means of each key; Is set, at a given velocity in each stage,
Adjustment drive means M2 for driving each key; and adjustment sound detection means M3 for detecting the volume of the piano generated sound in the volume adjustment mode.
If, for every predetermined velocity at each stage, certain volume when the specific key is driven by the adjustment drive means is detected by said adjusting sound detector, the relative ratio of the sound volume and its specific key reference level A relative reference level calculating means M4 for updating the reference level of each key accordingly and outputting the updated reference level as a relative reference level, and a comparison for comparing the volume of the piano sound and the relative reference level. Means M5 and correction means M for correcting the performance velocity data according to the comparison result.
6 is provided.

As shown in FIG. 12, the automatic volume control apparatus for an automatic performance piano according to the second invention performs an automatic performance in which a drive means for each key is driven based on performance velocity data for each key to perform an automatic performance. When a volume adjustment mode is set in a piano, an adjustment drive unit M11 that drives each key at a predetermined velocity set in one or more stages, and an adjustment sound that detects the volume of a piano generated sound in the volume adjustment mode Detecting means M12, average volume calculating means M13 for calculating an average volume of all keys detected by the adjusting sound detecting means M12 for each predetermined velocity of each stage, and adjusting sound for each predetermined velocity of each stage. Key volume deviation calculating means M14 for calculating a deviation between the volume of each key detected by the detecting means M12 and the average volume, and the deviation calculated for each predetermined velocity in each stage In response, the gist, further comprising a correction means M15 for correcting the velocity data for the playing.

[0011]

According to the present invention, the predetermined velocity in a plurality of stages is defined as:
For example, this refers to a velocity determined corresponding to each volume by dividing the level of the volume into a plurality of levels, such as pianissimo, piano, mezzo piano, mezzo forte, forte, fortessimo, and the like.

The reference level in the first invention means, for example, a predetermined volume for each key for a certain velocity set before the automatic performance piano is shipped. As the volume at this time, for example, data obtained by capturing the volume in dB as in a normal volume measurement device can be used.

The automatic volume measuring apparatus for an automatic performance piano according to the first invention corrects the velocity of each key of the piano by the following procedure to automatically adjust the volume (see FIG. 1). The reference level storage means M1 stores, as a reference level, a predetermined volume of each key with respect to a predetermined velocity at each stage. In a state where the volume adjustment mode is set, the relative reference level calculation means M4 determines the volume when a specific key is driven by the adjustment drive means M2 at a predetermined velocity, at a location at a certain distance from the automatic performance piano. The reference level of each key is updated according to the relative ratio between the volume and the reference level of the key, detected by the adjustment sound detection means M3 installed in the
This is output and stored as a relative reference level. This operation is performed for each predetermined velocity at each stage. The adjustment driving means M2 sequentially drives the keys KEY of the piano at a predetermined velocity in each stage in a state where the volume adjustment mode is set. At this time, the adjustment sound detecting means M3 is output from the piano.
Captures the piano-generated sound of each key and detects the volume of each key for a given velocity at each stage. The compensating means M6 compares the volume of the detected piano-generated sound with the relative reference level as a result of the comparison means M5. Performs no correction. When the comparing unit M5 compares the volume of the detected piano-generated sound with the above-mentioned relative reference level, the comparing unit M6 determines that the volume is out of an allowable range considered as the relative reference level. The velocity of the key is corrected according to the degree of deviation. The correction means M6 is provided with performance velocity data DATA
When the is actually played, the velocity of each key is corrected according to and according to.

In the procedure and the correction, the correction is made according to the result of comparison between the sound generated from the piano and the relative reference level. The relative reference level used here is, as described in the procedure, for a specific key. The reference level of each key is corrected based on the relative ratio of the volume detected by the adjustment sound detecting means M3 installed at a place at a distance from the automatic performance piano to the previously stored reference level of the key. It has been calculated.

That is, since the relative reference level is calculated based on the ratio between the sound generated from a specific key and the reference level of the key, the installation position of the adjustment sound detection means is not limited to the vicinity of the piano, but may be any position. The user can select and can listen to a performance with a balanced volume from the high frequency range to the low frequency range near the position. Further, since the correction is performed based on the relative reference level without performing the correction based on the absolute reference level, it is possible to correct the velocity and adjust the volume even when the key is deteriorated.

The automatic volume adjusting device for an automatic performance piano according to the second invention automatically adjusts the volume by correcting the velocity of each key of the piano by the following procedure (see FIG. 12). The adjustment driving means M11 sequentially drives the keys KEY of the piano according to the predetermined velocities of the respective stages stored in advance in a state where the volume adjustment mode is set. At this time, the adjustment sound detecting means M12 installed at a place separated from the piano by a certain distance captures the piano generated sound of each key, and detects the volume for a predetermined velocity at each stage. The average volume calculation means M13 calculates the average volume of the volume of all the keys detected in the above or the divided key range for the predetermined velocity in each stage. The key volume deviation calculating means M14 calculates a deviation between the volume of each key detected in the above and the average volume calculated in the above for the predetermined velocity at each stage. If the deviation calculated in the step is within a predetermined allowable range, the correcting means M15 does not correct the predetermined velocity at that stage in the key. The correcting means M15 corrects the velocity of the key according to the degree of the deviation if the deviation calculated in the step deviates from the predetermined allowable range. The correction means M15 is provided with performance velocity data DAT.
When actually playing A, the velocity of each key is corrected according to and according to.

In the procedure and the correction, the correction is made in accordance with the deviation between the sound generated from the piano and the average volume. The average volume used here is, as described in the procedure, set at a place separated from the automatic performance piano by a certain distance. The average volume of all keys or divided key ranges detected by the adjusted sound detection means M12.

For this reason, the installation position of the adjustment sound detecting means is not limited to the vicinity of the piano, but can be selected at any position, and the user can listen to a performance with a balanced volume from the high range to the low range near the position. In addition, since the above correction is not performed by calculating an absolute deviation from the reference level, it is possible to correct the velocity and adjust the volume even when the key is deteriorated.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The first embodiment is an automatic adjustment apparatus for an automatic performance piano to which the first invention is applied. As shown in FIG. 2, an automatic performance piano 1 as a first embodiment has a key 3
Is pressed to drive the hammer 5 via the action mechanism 4 to strike the string 6, and a control unit for outputting a drive signal to a drive circuit 35 disposed at the lower back of the key 3. 13 and control unit 13
A key sensor 7 for inputting performance information combining a key number, a key press timing, a key release timing, and a velocity
8 and a microphone 1 connected to the control unit 13 via the A / D converter 15 and output by wire
7 (corresponding to the adjustment sound detecting means of the present invention).

The control unit 13 is a logical operation circuit including a CPU 21, a ROM 22, a RAM 23, a backup RAM 24, a clock 25, and the like, as shown in FIG. The microphone 17, the key sensors 7 and 8, and the drive circuit 35 are connected to the control unit 13 via the input / output port 26.

When the power of the automatic performance piano 1 is turned on, the control unit 13 creates automatic performance data based on input signals from the key sensors 7 and 8 by a so-called event type recording method. The created automatic performance data is supplied to the floppy disk driver 31 via the input / output port 26, and the floppy disk 33
Is stored. Conversely, this automatic performance data is
Read from the floppy disk 33 and drive circuit 35
The playback is performed by the event method. The control unit 13 performs such recording,
An operation panel 37 for instructing each operation such as reproduction, a display 39 for display, and the like are also connected via the input / output port 26.

The ROM 22 has a full range, that is, key numbers 1 to 88.
In consideration of the sound volume balance, a predetermined sound volume when the key number n is driven at the predetermined velocity V0 is set and stored as the reference level P'n. Further, a program for executing various processes described below is stored. In this embodiment, only one predetermined velocity V0 is used.

One feature of the present embodiment is that a velocity correction coefficient calculation process having a procedure as shown in FIG. 4 is executed before the automatic performance starts. Hereinafter, the velocity correction coefficient calculation processing will be described. The velocity correction coefficient calculation process
The process starts when the volume adjustment mode is selected on the operation panel 37 (S101).

When this process is started, first, a relative reference level is calculated by a relative reference level calculation routine (S110) described later. Next, 1 is substituted for the key number n and a predetermined velocity V0 is substituted for the velocity Vn (S10).
2) The process proceeds to an adjustment sound detection routine (S120), which will be described later, and a comparison process / temporary correction coefficient calculation process routine (S140). Upon completion of the processing of each routine and returning to the main flow of FIG. 4, it is determined whether or not the key number n has been completed to the end, that is, whether or not the key number n is 88 (S103).
If the key number n is not 88 (S103: “NO”),
The key number n is n + 1, and the velocity Vn is the predetermined velocity V
0 is substituted (S104), the adjustment sound detection routine (S120) is again performed, and the comparison processing / temporary correction coefficient calculation routine (S120) is performed.
140). If the key number n is 88 (S103:
“YES”), a correction coefficient calculation routine to be described later (S16)
0), and after completing the processing, returns to the main flow of FIG. 4 again and ends the velocity correction coefficient calculation processing.

Next, the processing of each routine will be described. (1) Relative Reference Level Calculation Routine (S110) The relative reference level calculation routine (S11) shown in FIG.
0) substitutes a specific key number m for the key number n and a predetermined velocity V0 for the velocity Vn (S111), and executes an adjustment sound detection routine (S120) described later. Next, the relative ratio pm / P'm of the detected sound volume pm to the reference level P'm of the key number m stored in the ROM 22 in advance is calculated (S112). Substitute 1 for the key number n (S11
3), relative ratio pm / P'm and reference level P'n of key number n
The relative reference level Pn is calculated from the above and stored in the RAM 23 (S114). Thereafter, it is determined whether or not the key number n is 88 (S115). If the key number n is not 88 (S1)
15: “NO”), substituting n + 1 for the key number n (S1
16) The relative reference level Pn is calculated again,
To memorize. If the key number n is 88 (S115: “YE
S "), this process ends, and the process returns to the main flow in FIG. (2) Adjustment Sound Detection Routine (S120) The adjustment sound detection routine (S120) shown in FIG. 6 is based on the key number n and the velocity Vn which are given information.
The control unit 13 issues a command to the drive circuit 35 to drive the key with the key number n with the velocity Vn to output a piano sound with the key number n (S121). This microphone sound is detected by the microphone 17 installed at a distance from the piano (S122).
The information flows to the control unit 13 via the / D converter 15, and the sound volume pn of the generated sound of the key number n is stored in the RAM 23 as a dB unit (S123). After the above processing is completed, the process returns to the main flow of FIG. (3) Comparison Processing / Temporary Correction Coefficient Calculation Routine (S140) The comparison processing / temporary correction coefficient calculation routine (S1) shown in FIG.
40) reads out the volume pn for the key number n stored in the adjustment sound detection routine and the relative reference level Pn for the key number n stored in the RAM 23 (S).
141). As a result of comparing them, 0.95Pn ≦ pn
It is determined whether or not ≦ 1.05Pn is satisfied (S14).
2). When the volume pn satisfies this relationship (S142:
[YES]), 1 is substituted for the temporary correction coefficient Cn of the key number n (S144), and when this relationship is not satisfied (S142:
"NO") Then, it is determined whether or not the sound volume pn <0.95Pn is satisfied (S143). When this relationship is satisfied (S143: "YES"), 1.05 is substituted for the temporary correction coefficient Cn of the key number n (S145). On the other hand, when this relationship is not satisfied, that is, when pn> 1.05Pn (S143: "NO"), 0.95 is substituted for the temporary correction coefficient Cn of the key number n (S146).

Next, when the temporary correction coefficient Cn is 1 (S1
44), the corrected velocity Vn × Cn is substituted for the velocity Vn of the key number n, and the data is stored and saved in the RAM 23 (S147). The temporary correction coefficient Cn is 1.0
When it is 5 or 0.95 (S145 or S146), the velocity Vn of the key number n is corrected to the velocity Vn × Cn.
And the data is temporarily stored (S148).
After the above processing is completed, the process returns to the main flow of FIG. (4) Correction Coefficient Calculation Routine (S160) The correction coefficient calculation routine (S160) shown in FIG. 8 first determines whether or not the velocities Vn of all the key numbers n have been stored in the RAM 23 (S161). When the velocities Vn of all the key numbers n are stored in the RAM 23 (S161: "YES"), the velocity correction coefficient Dn for each key number is stored and stored in the RAM 23 as Vn / V0 (S165), and FIG. Return to the main flow. On the other hand, the velocity Vn of at least one key number n
Is not stored and is in the state of temporary storage (S161:
"NO"), that is, the volume pn of the key number n is within the allowable range of the relative reference level Pn (in this embodiment, 0.95Pn≤
If pn ≦ 1.05Pn), the processing from S162 is performed.

First, it is determined whether or not the answer to the previous question (S161) is "No" for the sixth time (S162). If it is the sixth time (S162: "YES"), it will be described later.
If it is not the sixth time (S162: "NO"), among the temporarily stored velocities Vn, the velocity Vn having the smallest key number n is sequentially read (S163).
According to the read data, the adjustment sound detection routine (S1
20), comparison processing / temporary correction coefficient calculation routine (S14)
Perform 0).

Subsequently, the temporarily stored velocity V
It is determined whether or not n has been read to the end (S164).
If the data has not been read to the end (S164: “N
O "), and returns to S163. If the reading has been completed (S164: "YES"), the process returns to S161, and it is determined whether or not the velocities Vn of all the key numbers n have been stored in the RAM 23 again.

This correction coefficient calculation routine (S160)
S162 → S163 until it is confirmed that the velocities Vn of all the key numbers n have been stored in the RAM 23.
→ S120 → S140 are repeated, but S162
When it is determined that the repetition processing has been performed six times (S161: "YES"), the key number "n" and the comment "repair required" are displayed on the display for the velocity Vn temporarily stored at that stage. (S16
After 6), return to the main flow of FIG.

In the present embodiment, 0.95, 1, 1.05 are used as the temporary correction coefficient Cn in the comparison processing / temporary correction coefficient calculation processing routine according to the above-described classification, and the correction coefficient calculation routine (S160) Since the repetition processing is performed five times in ()), the velocity correction coefficient Dn is set to 0.
It is set in the range of 77 to 1.28. When it is desired to set the velocity correction coefficient in a desired range, a numerical value set as a temporary correction coefficient or the number of times of repetition processing may be appropriately selected.

This concludes the description of the velocity correction coefficient calculation processing. At this stage, the velocity correction coefficient Dn unique to each key number n is stored in the RAM 23. Before turning off the automatic performance piano 1, RA
If each velocity correction coefficient Dn stored in M23 is copied and stored in the backup RAM 24 or the floppy disk 33, the velocity correction coefficient Dn is read out from the backup RAM 24 or the floppy disk 33 and used when the power is turned on next time. Therefore, it is not necessary to perform the velocity correction coefficient calculation process again.

Next, the performance correction process will be described. As shown in FIG. 9, first, the performance mode is set and the velocity data for performance is sequentially read from the floppy disk (abbreviated as FD in FIG. 9) 33 (S201). According to the key number n of the read performance velocity data,
Velocity correction coefficient D already stored in RAM 23, backup RAM 24 or floppy disk 33.
n, the velocity Vn after correction to the velocity Vn ×
Dn is substituted (S202), and then the control unit 13 drives the key of the key number n with the velocity Vn via the drive circuit 35 (S203), and outputs a piano sound (S204). It is determined whether or not the performance velocity data on the floppy disk 33 has been read to the end (S205), and this processing is repeated until it is confirmed that the performance velocity data has been read to the end. When the performance velocity data has been read to the end, the processing is terminated.

By the performance correction processing, the automatic performance piano 1 reads out the performance velocity data from the floppy disk 33 and performs the performance while correcting the velocity data. This performance can be heard as a performance in which the balance of the sound volume is optimized particularly at and near the place where the microphone 17 is installed in the velocity correction coefficient calculation process.

Next, the pre-performance correction processing will be described.
As shown in FIG. 10, first, the velocity data for performance is sequentially read from a floppy disk (abbreviated as FD in FIG. 10) (S301). According to the key number n of the read performance velocity data, the velocity Vn is calculated by the velocity correction coefficient Dn already stored in the RAM 23, the backup RAM 24 or the floppy disk 33.
Is substituted for the corrected velocity Vn × Dn, and the velocity Vn is stored in the RAM 23 (S302). It is determined whether or not the performance velocity data of the floppy disk 33 has been read to the end (S303), and this processing is repeated until it is confirmed that the performance velocity data has been read to the end. When the performance velocity data is read to the end, the corrected velocity Vn stored in the RAM 23 is read.
Is stored and stored in the backup RAM 24 or the floppy disk 33 as corrected performance velocity data (S304), and the process is terminated. Accordingly, if the corrected performance velocity data is read and used from the next time, the volume balance can be obtained at the place where the microphone 17 is installed and in the vicinity thereof at the time of the velocity correction coefficient calculation processing without performing the correction processing during the performance. You can listen to the optimized performance.

Although the embodiment of the first invention has been described above, the invention is not limited to the above embodiment, and can be implemented in various modes without departing from the gist of the invention. For example, as described above, instead of setting the predetermined velocity to only one velocity V0, the velocity V1 when the volume is low, and the velocity V when the volume is medium.
2. The velocity may be set in a plurality of stages according to the strength of the sound, such as velocity V3 when the volume is high (see the second embodiment).

In the first embodiment, the detected sound volume p
The correction is performed by multiplying n by the velocity correction coefficient Dn. Alternatively, the correction may be performed by adding or subtracting an appropriate correction value to the detected sound volume pn. In calculating the relative ratio in S112 and the like, a correction value in various types of proportional calculation may be added, or a correction term based on an exponent or logarithm may be added.

As the reference level P'n, a value in which the predetermined volume corresponding to the predetermined velocity V0 is stored in the ROM 22 for each key before shipment of the automatic performance piano is used. A player-specific reference level may be set and selected. In other words, the velocity data recorded when a certain player performs his / her own performance according to a certain score is compared with the velocity data for performance that has faithfully performed according to the score.
The player's peculiar keying habits (for example, striking a certain key more than the instruction in the musical score) are grasped as a player correction coefficient, and the reference level P′n is corrected by the player correction coefficient. It is assumed that the reference level P''n can be stored in the RAM 23. Then, by selecting a reference level P''n unique to the player and correcting other performance velocity data in the same manner as in the first embodiment, the performance by the automatic performance piano is performed as if the player were performing. It can be expressed as if it were.

Further, in the first embodiment, the relative ratio pm / P'm is obtained for a specific key number m, and the relative ratio is multiplied by the reference level of each key to calculate the relative reference level Pn. First, all keys are stored in a plurality of key ranges, for example, key numbers 1-2.
It is divided into four key ranges of 2, 23 to 44, 45 to 66, and 67 to 88, and the above-mentioned relative ratio is obtained for each key range. You may use and ask. Essentially, when the same velocity is given to each key in a piano, the volume does not all become the same, but there is a difference between the low range and the high range, so by correcting the key range by dividing it into multiple parts, The volume balance can be performed more accurately.

Further, in the first embodiment, the microphone as the adjustment sound detecting means is output by wire, but may be output by radio to facilitate installation at an arbitrary position. Next, a second embodiment will be described. The second embodiment is an automatic performance piano adjusting apparatus to which the second invention is applied.

The construction of the automatic performance piano as the second embodiment is the same as that of the first embodiment shown in FIGS. For this reason, the components of the second embodiment are denoted by the same reference numerals as those of the first embodiment. In the second embodiment, the ROM 2
Reference numeral 2 does not store the reference level P'n stored in the first embodiment. Instead, three predetermined velocities V01 (volume: equivalent to piano) and V02 are used as a plurality of predetermined velocities. (Volume: standard) and V03 (volume: equivalent to forte) are stored. Furthermore, ROM
22 stores programs for executing the following various processes.

One feature of the second embodiment is that a velocity correction coefficient calculation process having a procedure as shown in FIG. 13 is executed before the automatic performance starts. Hereinafter, the velocity correction coefficient calculation processing will be described. The velocity correction coefficient calculation process is started when the volume adjustment mode is selected on the operation panel 37 (S501).

When this processing is started, first, 1 is substituted for m for the predetermined velocity V0m at the m-th stage (S
502). Next, 1 is substituted for the key number n, and a predetermined velocity V0m is substituted for the velocity Vnm (S503), and an adjustment sound detection routine (S520) described later is executed. Then, when this routine ends and returns to the main flow of FIG. 13, it is determined whether or not the key number n has been completed to the end, that is, whether or not the key number n is 88 (S504). Key number n
Is not 88 (S504: "NO"), the key number n
And the predetermined velocity V0m is substituted for the velocity Vnm (S505), and the adjustment sound detection routine (S52) is performed again.
Perform 0). If the key number n is 88 (S504 “YE
S "), average volume A of all keys at a predetermined velocity V0m
Pm is calculated by the following equation (i) (S506). APm = (p1m + p2m +... + P88m) / 88 (88) Next, 1 is substituted into the key number n and a predetermined velocity V0m is substituted into the velocity Vnm again (S507). Then, a comparison process / temporary correction coefficient calculation routine (S540) to be described later is executed, and after the end, the process returns to the main flow of FIG. At this stage, it is determined whether the key number n is 88 (S508).
If the key number n is not 88 (S508: “NO”),
The key number n is n + 1, and the velocity Vnm is the predetermined velocity V
By substituting 0m (S509), the comparison processing / temporary correction coefficient calculation routine (S540) is performed again. If the key number n is 88 (S508: "YES"), the process proceeds to a correction coefficient calculation routine (S560), which will be described later, and after ending the process, returns to the main flow of FIG. 13 again. And at this stage,
The predetermined velocity V0m has been completed to the end, that is, m is 3
It is determined whether or not (S510). If m is not 3 (S510: "NO"), that is, if the processing for the predetermined velocity V03 in the third stage has not been completed, m is set to m.
+1 is substituted (S511), and the processing after S503 is performed again for the predetermined velocity V0 (m + 1) at the next (m + 1) th stage. If m is 3 (S510: "YES"), the velocity correction coefficient calculation process ends.

Next, the processing of each routine will be described. (1) Adjustment Sound Detection Routine (S520) In the adjustment sound detection routine (S520) shown in FIG. 14, the control unit 13 issues a command to the drive circuit 35 in accordance with the provided key number n and velocity Vnm. The key with the key number n is driven at the velocity Vnm, and the piano generated sound with the key number n is output (S521). The microphone 17 installed at a location separated from the piano by a certain distance detects this piano generated sound (S522),
Information flows to the control unit 13 via the A / D converter 15, and the volume pnm of the sound generated with the key number n is stored in the RAM 23 as a dB unit (S523). After the above processing is completed, the process returns to the main flow in FIG. (2) Comparison Processing / Temporary Correction Coefficient Calculation Routine (S540) The comparison processing / temporary correction coefficient calculation routine (S540) shown in FIG.
In step S540, the deviation Δpnm is calculated by the following equation (ii) (S541). Δpnm = (pnm−APm) (ii) Then, it is determined whether the deviation Δpnm satisfies −1 ≦ Δpnm ≦ 1 (S542). When the deviation Δpnm satisfies this relationship (S542: “YES”), 1 is substituted for the temporary correction coefficient Cnm of the key number n (S544), and when this relationship is not satisfied (S542: “NO”), It is determined whether or not Δpnm <−1 is satisfied (S54)
3). When this relationship is satisfied (S543: “Y
ES "), and assigns 1.05 to the temporary correction coefficient Cnm of the key number n (S545). On the other hand, when this relationship is not satisfied, that is, when Δpnm> 1 (S543: “NO”), the key number n
0.95 is substituted for the temporary correction coefficient Cnm in (S546).

Next, when the temporary correction coefficient Cnm is 1 (S5
44), the corrected velocity Vnm × Cnm is substituted for the velocity Vnm of the key number n, and the data is stored and saved in the RAM 23 (S547). Temporary correction coefficient Cnm is 1.0
When it is 5 or 0.95 (S545 or S546), the velocity Vnm × Cnm after correction to the velocity Vnm of the key number n
And temporarily store the data (S548).
After the above processing is completed, the process returns to the main flow in FIG. (3) Correction coefficient calculation routine (S560) The correction coefficient calculation routine (S560) shown in FIG.
First, the velocities Vnm of all the key numbers n are stored in the RAM 23.
Is determined (S561). When the velocities Vnm of all the key numbers n are stored in the RAM 23 (S561: "YES"), the velocity correction coefficient Dnm for each key number is stored and stored in the RAM 23 as Vnm / V0m (S565), and FIG. Return to the main flow. On the other hand, the velocity V of at least one key number n
When nm is not stored and is in the state of temporary storage (S56
1: “NO”), that is, when the deviation Δpnm of the key number n is not within the allowable range (−1 ≦ Δpnm ≦ 1 in the present embodiment), the processing from S562 is performed.

First, it is determined whether or not the answer to "NO" to the previous question (S561) is the sixth time (S562). If it is the sixth time (S562: "YES"), it will be described later.
If it is not the sixth time (S562: "NO"), the velocity Vnm is sequentially read from the velocity Vnm having the smallest key number n among the velocities Vnm temporarily stored (S563).
According to the read data, the adjustment sound detection routine (S5)
20), comparison processing / temporary correction coefficient calculation routine (S14)
Perform 0).

Subsequently, the temporarily stored velocity V
It is determined whether nm has been read to the end (S564),
If the data has not been read to the end (S564: “N
O "), and returns to S563. If the reading has been completed (S564: "YES"), the process returns to S561, and it is determined whether or not the velocities Vnm of all the key numbers n have been stored in the RAM 23 again.

This correction coefficient calculation routine (S560)
S562 → S563 until it is confirmed that the velocities Vnm of all the key numbers n are stored in the RAM 23.
→ S520 → S540 are repeatedly performed.
In step S562, when it is determined that the repetition process has been performed six times ("YES"), the key number "n" and the comment "repair required" are displayed on the display for the temporarily stored Vnm at that stage ( After S566), the process returns to the main flow of FIG.

In this embodiment, 0.95, 1, 1.05 is used as the temporary correction coefficient Cnm in the comparison processing / temporary correction coefficient calculation processing routine in accordance with the above-described classification, and the correction coefficient calculation routine ( Since the repetition processing is performed five times in S560), the velocity correction coefficient Dnm is set in the range of 0.77 to 1.28. When it is desired to set the velocity correction coefficient in a desired range, a numerical value set as the provisional correction coefficient Cnm or the number of times of repetition processing may be appropriately selected. This concludes the description of the velocity correction coefficient calculation processing. At this stage, the correction table (see Table 1) of the velocity correction coefficient of each key number for the predetermined velocity at each stage is stored in the RAM 23. Before turning off the power of the automatic performance piano 1,
If the correction table stored in the RAM 23 is copied and stored in the backup RAM 24 or the floppy disk 33, the backup RAM 2 will be stored the next time the power is turned on.
4 or the floppy disk 33, the correction table can be read and used, so that it is not necessary to perform the velocity correction coefficient calculation processing again.

[0049]

[Table 1]

Next, the performance correction process will be described. As shown in FIG. 17, first, the performance mode is set and the velocity data for performance is sequentially read from the floppy disk (abbreviated as FD in FIG. 17) 33 (S60).
1). The read data is key number n, velocity RV
n, the RAM 23, the backup RAM 2
4 or a velocity correction coefficient D of this data is calculated based on the correction table stored in the floppy disk 33 (S602). An example is shown below.

When RVn <V01, the velocity correction coefficient D uses the velocity correction coefficient Dn1 as it is. V01
When ≤RVn ≤V02, the velocity correction coefficient D is given by the following equation (i
ii).

D = Dn1 + (RVn−V01) · (Dn2−Dn1) / (V02−V01) (iii) When V02 <RVn ≦ V03, the velocity correction coefficient D is calculated by the following equation (iv). D = Dn2 + (RVn-V02). (Dn3-Dn2) / (V03-V02) (iv) When RVn> V03, the velocity correction coefficient D uses the velocity correction coefficient Dn3 as it is.

The graph shown in FIG. 18 shows the relationship between the velocity correction coefficient D calculated as described above and the velocity RVn. As described above, since the velocity correction coefficient D is continuously changed with respect to the velocity RVn, the relation between the corrected velocity D × RVn and the volume generated thereby is also a continuous relation.

The velocity correction coefficient D is calculated for the sequentially read velocity data as described above, and the corrected velocity D × RV is added to the velocity RVn of the key number n.
n is substituted (S603). Then, the control unit 13 drives the key with the key number n with the velocity RVn via the drive circuit 35 (S604), and outputs a piano sound (S605). It is determined whether or not the performance velocity data on the floppy disk 33 has been read to the end (S606), and this processing is repeated until it is confirmed that the performance velocity data has been read to the end. When the performance velocity data has been read to the end, the processing is terminated.

By the performance correction processing, the automatic performance piano 1 reads out the performance velocity data from the floppy disk 33 and performs the performance while correcting this. This performance can be heard as a performance in which the balance of the sound volume is optimized particularly at and near the place where the microphone 17 is installed in the velocity correction coefficient calculation process.

Next, the pre-performance correction processing will be described.
As shown in FIG. 19, first, performance velocity data for a performance is sequentially read from a floppy disk (abbreviated as FD in FIG. 19) (S701). For the key number n and the velocity RVn of the read data, a velocity correction coefficient D is calculated based on the correction table already stored in the RAM 23, the backup RAM 24 or the floppy disk 33 (S702: see FIG. 18). . Then, the corrected velocity D × RVn is substituted for the velocity RVn and stored in the RAM 23 (S703). It is determined whether or not the performance velocity data on the floppy disk 33 has been read to the end (S704), and this process is repeated until it is confirmed that the performance velocity data has been read to the end. When the performance velocity data is read to the end, the corrected velocity RVn stored in the RAM 23 is read.
Is stored and saved in the backup RAM 24 or the floppy disk 33 as corrected performance velocity data (S705), and the process is terminated. Accordingly, if the corrected performance velocity data is read and used from the next time, the volume balance can be obtained at the place where the microphone 17 is installed and in the vicinity thereof at the time of the velocity correction coefficient calculation processing without performing the correction processing during the performance. You can listen to the optimized performance.

Although the embodiment of the second invention has been described above, the invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist of the invention. For example, instead of setting the predetermined velocity in three stages as described above, only one predetermined velocity V0 may be used (see the first embodiment).

In the second embodiment, the detected sound volume p
The correction is performed by multiplying nm by a velocity correction coefficient Dnm. Alternatively, the correction may be performed by adding or subtracting an appropriate correction value to the detected sound volume pnm. Further, the average sound volume APm was calculated by averaging the sound volumes of all keys, but instead, all keys were assigned to a plurality of key ranges, for example, key numbers 1-22, 23-44, 45-6.
6, 67-88, and the average volume of each key range may be calculated, and the deviation Δpnm may be obtained using the average volume of the key range to which the key number belongs. Essentially, when the same velocity is given to each key in a piano, the volume does not all become the same, but there is a difference between the low range and the high range, so by correcting the key range by dividing it into multiple parts, The volume balance can be adjusted more accurately.

In the second embodiment, the microphone as the adjustment sound detecting means is output by wire, but may be output by radio to facilitate installation at an arbitrary position.

[0060]

As described above in detail, according to the automatic volume control apparatus for an automatic performance piano of the present invention, the balance of the volume of each key can be adjusted at an arbitrary listening position. In other words, the installation position of the adjustment sound detection means is not limited to the vicinity of the piano, but can be selected at any position, and the user can listen to a performance with a balanced volume from the high range to the low range near the position. Further, since the correction is not performed based on the absolute reference level, the correction can be performed even when the key is deteriorated.

Furthermore, since the volume of each key of the piano can be easily and automatically adjusted for each key, anyone can listen to a more appropriate or more suitable performance. it can.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an automatic volume control device for an automatic performance piano according to a first invention.

FIG. 2 is a schematic configuration diagram showing a main configuration of an automatic volume control device for an automatic performance piano according to first and second embodiments.

FIG. 3 is a schematic configuration diagram showing a connection relationship between a control unit and each unit in the automatic volume control device of the automatic performance piano of the first and second embodiments.

FIG. 4 is a flowchart of a velocity correction coefficient calculation process in the first embodiment.

FIG. 5 is a flowchart of a relative reference level calculation process in the first embodiment.

FIG. 6 is a flowchart of an adjustment sound detection process in the first embodiment.

FIG. 7 is a flowchart of a comparison process / temporary correction coefficient calculation process in the first embodiment.

FIG. 8 is a flowchart of a correction coefficient calculation process in the first embodiment.

FIG. 9 is a flowchart of performance correction processing in the first embodiment.

FIG. 10 is a flowchart of a pre-performance correction process in the first embodiment.

FIG. 11 is a velocity-volume correlation diagram of keys of an automatic performance piano.

FIG. 12 is a schematic configuration diagram of an automatic volume control device for an automatic performance piano according to a second invention.

FIG. 13 is a flowchart of a velocity correction coefficient calculation process in the second embodiment.

FIG. 14 is a flowchart of an adjustment sound detection process in the second embodiment.

FIG. 15 is a flowchart of a comparison process / temporary correction coefficient calculation process in the second embodiment.

FIG. 16 is a flowchart of a correction coefficient calculation process in the second embodiment.

FIG. 17 is a flowchart of performance correction processing in the second embodiment.

FIG. 18 is a graph showing a relationship between a velocity and a velocity correction coefficient at a key number n in the second embodiment.

FIG. 19 is a flowchart of a pre-performance correction process in the second embodiment.

[Explanation of symbols]

1 ... automatic performance piano, 3 ... keys, 4 ...
・ Action mechanism, 5 ・ ・ ・ Hammer, 6 ・ ・ ・
String, 7, 8 ... key sensor, 9
... Sounding mechanism section 13 ... Control unit 15 ... A / D converter 17.
..Microphones, 26 input / output ports,
31 ... Floppy disk driver, 33 ...
Floppy disk, 35 ... Drive circuit, 37 ...
.Operation panel, M1... Reference level storage means, M2
... Adjustment drive means, M3 ... Adjustment sound detection means,
M4: relative reference level calculation means M5: comparison means, M6: correction means, M11: adjustment drive means, M12: adjustment sound detection means, M13: average volume calculation means, M1
4: Key volume deviation calculating means, M15: correcting means

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Inaba 200 Terashimacho, Hamamatsu-shi, Shizuoka Prefecture Kawai Musical Instruments Co., Ltd. (56) References JP-A-3-98093 (JP, A) JP-A-2-259696 (JP, A)

Claims (10)

(57) [Claims] 1. An automatic performance piano for performing an automatic performance by driving a driving means of each key based on performance velocity data of each key, wherein a predetermined volume of each key for a predetermined velocity set in one or a plurality of stages is determined. Reference level storage means for storing as a reference level; When a volume adjustment mode is set; Adjustment drive means for driving each key at a predetermined velocity at each stage; and Detecting the volume of a piano generated sound in the volume adjustment mode Adjustment sound detection means, for each predetermined velocity at each stage, the sound volume when a specific key is driven by the adjustment drive means is detected by the adjustment sound detection means, and the volume and the reference level of the specific key are detected. update the reference level of each key according to the relative ratio, the relative reference level calculating means for outputting it as a relative reference level, volume and the phase of the piano sound generated Specifically a reference level and comparing means for comparing, said comparing and correcting means for correcting the velocity data for the performance according to the result, the automatic volume control device for an automatic player piano, characterized in that it comprises a. 2. The apparatus according to claim 1, wherein the correction means obtains a velocity correction coefficient for each key in accordance with the comparison result obtained by the comparison means, and corrects the performance velocity data using the velocity correction coefficient. The automatic volume control device of the automatic performance piano according to the above. 3. The reference level storage means stores a predetermined volume of each key with respect to a predetermined velocity of each stage, and
3. The automatic volume adjusting device for an automatic performance piano according to claim 1, wherein the automatic volume is set to a value and stored as a reference level unique to the player . 4. The relative reference level calculation means calculates the relative ratio for each of a plurality of divided key ranges, and updates the reference level of each key according to the relative ratio of the key range to which the key belongs. This
Automatic volume control device for an automatic player piano according to any one of claims 1 to 3 for outputting a record as a relative reference level. 5. An automatic performance piano in which a driving means of each key is driven based on performance velocity data of each key to perform an automatic performance, wherein when a volume adjustment mode is set, one or more steps are set. Adjustment drive means for driving each key at a predetermined velocity; adjustment sound detection means for detecting the volume of a piano generated sound in a volume adjustment mode; and all of the adjustment sounds detected by the adjustment sound detection means for each predetermined velocity at each stage. Average volume calculating means for calculating an average volume of the key volume, and key volume deviation calculating means for calculating a deviation between the volume of each key detected by the adjustment sound detecting means and the average volume for each predetermined velocity at each stage. And correction means for correcting the performance velocity data in accordance with the deviation calculated for each predetermined velocity in each stage. Volume control device. 6. A correction means for determining a velocity correction coefficient for each key according to a deviation calculated for each predetermined velocity in each step, and correcting the performance velocity data using the velocity correction coefficient. 5. An automatic volume control device for an automatic performance piano according to claim 5. 7. The average sound volume calculating means calculates an average sound volume for each of a plurality of divided key ranges for the sound volume of all keys detected by the adjustment sound detecting means for each predetermined velocity at each stage, and The volume deviation calculating means calculates a deviation between the volume of each key detected by the adjustment sound detecting means and the average volume of a key range to which the key belongs, for each predetermined velocity at each stage. Automatic volume control device for automatic performance piano. 8. The correction means according to claim 1, wherein said correction means is provided when actually performing.
Correct performance velocity data read from recording media
8. An automatic volume control device for an automatic performance piano according to claim 1. 9. The automatic performance piano according to claim 1, wherein said correction means corrects all performance data recorded in advance before the performance and records the corrected performance data as corrected performance data. Volume control device. 10. The automatic volume adjustment device for an automatic performance piano according to claim 1, wherein said adjustment sound detection means outputs detection data wirelessly or by wire.