JPH0531160B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a performance data recording device that records the process of a performance on a piano or the like as performance data on a storage medium.

In recent years, various automatic piano performance devices have been developed and put into practical use. This device includes a data recording device that creates performance data based on the output of a sensor that detects the on/off of each piano key and the strength of keystrokes, and stores it in a storage medium such as a floppy disk. The device consists of a data playback device that reads performance data from the player and uses the read data to drive a key drive solenoid to perform automatic piano performance.These data recording devices and playback devices are usually configured as one unit. be done.

By the way, in the case of conventional automatic piano performance devices, the data recording device simply records the keystroke intensity (i.e., volume data) detected by a sensor on the storage medium as is, and for this reason, design changes and new models are not possible. When the sensor changes due to development, etc., there is a problem that the design of the data playback device must also be changed, and furthermore, performance data recorded by sensors with different characteristics must be played back by the same data playback device. I had a problem that I couldn't do it.

Therefore, the present invention eliminates the need to change the design of the data reproducing device even when the sensor is changed due to a design change, etc., and allows performance data recorded by sensors with different characteristics to be transferred to the same data reproducing device. The present invention provides a performance data recording device that can be played back using a computer, and is characterized in that volume information is standardized and recorded in a storage section.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a performance data recording apparatus according to the present invention. In this diagram,
Reference numeral 1 denotes a piano keyboard, and below each key of this keyboard 1 are a first key switch K ₁ and a second key switch K ₂ (not shown) for detecting key on/off and keystroke strength, respectively. are installed in parallel. When the keys are operated, first the first key switch _K1 is turned on, and then the second key switch _K2 is turned on. The key switch group 2 is a block showing a collection of the above-mentioned key switches. The key data generation circuit 3 sequentially scans the output of each key switch in the key switch group 2 to detect the on/off state of each key switch. When a certain key is operated, the time from when the first key switch _K1 of the key is turned on until the second key switch _K2 is turned on is measured, and this measurement result (i.e., the key operation The speed is output as keystroke strength data KD (volume information), and the second key switch K ₂
When the key is turned on, the key code KC for the same key is
Output. A CPU (Central Processing Unit) 4 controls each part of the apparatus based on a program stored in a ROM (Read Only Memory) 5, and is connected to each part of the apparatus via a bus line 6.
RAM (random access memory) 7 is memory for storing data, ROM8 is keystroke strength data
KD → Standard keystroke strength data KDa (standard volume data)
This is a memory in which a conversion table is stored. Note that this conversion table will be detailed later.
Reference numeral 9 denotes a floppy disk device, 10 a disk controller for controlling the floppy disk device 9, and 11 a pulse generator that generates a clock pulse φ of a constant period (for example, 4 msec).

Next, the process of creating the conversion table stored in the ROM 8 mentioned above will be explained.

First, a specific piano equipped with a sensor for creating reference data is prepared. This particular piano, for example, is provided with two switches for each hammer, each for detecting the operating speed of the hammer. In this case, one of the two switches is placed in a position where it is turned on at the moment the hammer begins to move, and the other is placed in a position where it is turned on at the moment before the hammer strikes the string. Next, a specific performer plays a specific song on this specific piano, and the operating speed of each hammer during the playing process is detected based on the operating time interval of the two switches described above. From the results, the distribution of keystroke strength data (standard keystroke strength data KDa) for the above-mentioned specific song is obtained.

Next, the specific music is played to the specific performer for the first time.
The keyboard 1 shown in the figure is played, and the distribution of keystroke strength data KD output from the key data generation circuit 3 during the playing process is obtained. Next, a conversion formula is found to make the distribution of this keystroke strength data KD match the distribution of the reference keystroke strength data KDa described above. This conversion formula is (KD×α), (KD−
β) Various formats are possible. Next, each value of keystroke strength data KD (for example, keystroke strength data KD
If is output as a value in the range 0 to 255,
0, 1, 2...255 values) using the above conversion formula, and use the conversion results as a conversion table.
Write to ROM8. The above is the conversion table creation process. This conversion table is created every time the sensor (key switch group 2 in FIG. 1) that detects the keystroke strength is changed.

Next, the operation of the apparatus shown in FIG. 1 will be explained.
Every time a clock pulse φ is output from the pulse generator 11, the CPU 4 reads the key code KC and the keystroke strength data KD output from the key data generation circuit 3 at that time, and each read data
Write KC and KD to RAM7. Next, the key code KC written in RAM7 last time (4 msec ago)
By comparing the key code KC written this time, changes in the on/off state of each key (hereinafter referred to as
Based on the detection result, the event block shown in Fig. 2 is stored in the RAM 7.
Create EB. In this event block EB, the timer data TD is data corresponding to the time from the previous event occurrence time to the current event occurrence time, and the event data ED is data in the format shown in Figure 3 A or B. . Here, Fig. 3A shows a case where the event is a key-on, and in this case, the key code KC of the key that has been turned on, the keystroke strength data KD of the same key, and the data "1" indicating key-on are each an event. data
Written to event block EB as ED. In addition, Figure 3 B shows the case where the event is a key-off, and in this case, the key code of the key that was turned off is
KC and data "0" indicating key-off are each written into event block EB as event data ED. Next, the CPU 4 reads out the keystroke strength data KD from the event block EB, converts it into corresponding address data, and supplies it to the ROM 8. As a result, the standard keystroke strength data KDa corresponding to the keystroke strength data KD is read from the ROM 8 and supplied to the CPU 4 via the bus line 6. CPU4 is
This standard keystroke strength data KDa is written in the area where the keystroke strength data KD of the event block EB is written. In other words, keystroke strength data KD
is rewritten to standard keystroke strength data KDa.

Thereafter, the above operation is performed every time the clock pulse φ is supplied to the CPU 4. Note that if no event is detected, the event block EB is not created. Then, when a certain number of event blocks EB are written in RAM7, the CPU
4 transfers the event block EB in the RAM 7 to the floppy disk device 9 via the disk controller 10 and writes it to the floppy disk of the device 9.

In the above-described embodiment, the keystroke strength (volume) is detected by the key switch group 2, but the present invention can of course be applied to the case where the volume is detected by other sensors (for example, a microphone, etc.). can do. In addition, the present invention is applicable to inputting music scores using a keyboard, or recording musical sounds from a record using a microphone.
It can also be applied when recording as data.

As explained above, the volume detection means detects volume information, and the volume information detected by the volume detection means is detected in advance by a specific reference volume detection means having detection characteristics that serve as a reference. Since it is equipped with a conversion means for converting into reference volume information and a recording means for recording the reference volume information converted by the conversion means in the storage section as one of the performance data, it is easy to avoid design changes, etc. Therefore, even if the sensor for detecting volume changes, there is no need to change the design of the data playback device, and performance data recorded by sensors with different characteristics can be used by the same data playback device. This has the advantage that it can be reproduced by

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing an event block EB created in the RAM 7 in FIG. 1, and FIG. FIG. 3 is a diagram showing the format and data content of event data ED in FIG. 3...Key data generation circuit, 4...CPU (Central Processing Unit), 7...RAM (Random Access Memory), 8...ROM (Read Only Memory), 9...
...Flotspy disk device.

Claims (1)

[Scope of Claims] 1. A performance data recording device that creates performance data based on musical tone information including at least pitch information and volume information, and records the created performance data in a storage unit, comprising: a volume for detecting the volume information; a detection means; a conversion means for converting the volume information detected by the volume detection means into reference volume information detected in advance by a specific reference volume detection means having detection characteristics serving as a reference; A performance data recording device comprising: recording means for recording the reference volume information converted by the conversion means in the storage section as one of the performance data.