JPS59102288A - Performance data collector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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, a few automatic piano performance devices have been developed and are now being used for commercial purposes. This device creates performance data based on the output of a sensor that detects the on/off status of each key on the piano and the strength of keystrokes, and stores the performance data in a storage medium such as a floppy disk. It consists of a data reproducing device that reads performance data, and uses the read data to drive a key drive solenoid to perform an automatic piano performance.These data recording devices and playback devices are usually integrated. By the way, in conventional automatic piano performance devices, the data recording device simply records the striking Si degree (i.e., volume data) detected by the sensor onto the storage medium. For this reason, the design was changed.

New model development, etc.] If the sensor changes, there is a problem in that the design of the data playback f + jf must also be changed, and furthermore, performance data recorded by sensors with different characteristics must be played back by the same data playback device. Therefore, this invention eliminates the need to change the design of the data reproducing device even if the sensor changes due to design changes, etc., and allows stones recorded by sensors with different characteristics.
The present invention provides a performance data recording device K that enables the reproduction of performance data by the same data reproducing device, and is characterized in that volume information is standardized and recorded in a storage section.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a performance data recording device according to the present invention. In this figure, reference numeral 1 denotes a piano keyboard, and below each key of this keyboard 1 are a first key switch 1 and a second key switch KtG for detecting key on/off and keystroke strength, respectively. (not shown) are provided in parallel. When a key is operated, first the first key switch is turned on, and then the second key switch is turned on. Key switch group 2 is a block showing a collection of the above-mentioned key switches. The key data generation circuit 3 detects the on/off state of each key switch by detecting the output fl1j of each key switch in the key switch group 2. When a certain key is operated, the time from when the first key switch of the key is turned on until the second key switch is turned on is measured, and this measurement result (i.e., the key operation speed) and keystroke strength data Kl)
(sound, useless information), and when the second key switch is turned on, the key code K C of the same key is output.
Output. The CPU (central processing unit) 4 controls each part of the device.
It is controlled based on a program stored in the OM (read-only memory) 5, and is connected to each part of the device via a path line 6.

RAM (random access memory) 7 is a memory for temporary storage of data, OM8 is memory; mtfi data KD →
This is a memory in which a conversion table for reference hammering force data KDa (reference volume data) is stored. Note that this conversion table will be explained in detail later. 9 is a floppy disk device, 10 is a disk controller that controls this floppy disk device 9, and 11 is a pulse generator that generates a clock pulse ψ of a constant period (for example, 4 m5ec). Explaining the process of creating the conversion table stored in
First, prepare a specific piano that is equipped with a sensor for creating reference data. This particular piano, for example, is equipped 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 at a position where it is turned on at the moment the hammer starts moving, and the other is placed at a position where it is turned on at the moment before the hammer strikes the string. Next, a specific player is asked to play 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 switch 211! described above. From the detection results, keystroke strength data of the above specific song (standard keystroke strength data KDa)
Obtain the distribution of

Next, the specific performer performs the specific song using board #i shown in FIG. Next, the conversion formula for matching the distribution of this keystroke strength data KD with the distribution of the reference keystroke strength data KDa described above is (KD
xα), (KD-β), etc. can be considered. Next, the six values of the keystroke strength data KD (for example, if the keystroke strength data KD is output as a value in the range of 0 to 255, the six values of 0°1.2...255) are converted as described above. Conversion is performed using the formula, and the conversion result is written to Oj:vi8 as a conversion table. The above is the conversion table creation process. This conversion table is created each 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 ψ is output from the pulse generator 1, the CPU 4 reads the key code KC and keystroke strength data KD that are output from the key data generation circuit 3 at that time.
and read each data KC and KD into AM7.
1 ton goes into it. Next, enter the key code KC stored in RAM7 last time (before the 4m type) and the key code written this time.
By comparing with C, a change in the on/off state of each key (hereinafter referred to as an event) is detected, and based on this detection result, an event block EB (2m+) is created in the LAM 7. In this event block EB, timer data TL) is data corresponding to the time from the previous event occurrence time to the current event occurrence time, and the event data ED is in the format shown in FIG. The data is @Here, Figure 3 (a)
is a case where the event is a key-on, and in this case, the key code KO of the key in the on state, the key press strength data KD of the same key, and the data "1" indicating key-on are each stored in the event block EB as event data ED. written. In addition, Fig. 3 (b) shows a case where the event is a key-off, and in this case, the key code KC of the off key is
and data “0” indicating key-off are event data E.
D in the event block EB. Next, the CPU 4 outputs the hitting strength data KDfWi in the event block J!JB, converts it to the corresponding address data, and supplies it to the OM 8.
Reference keystroke strength data KDa corresponding to the keystroke strength data KD is read from 8 and supplied to the CPU 4 via the pass line 6. The CPU 4 uses this standard keystroke strength data KD.
a, the stroke 8 strength data Kl of the event block HB
) write in the area where you are writing. That is, the keystroke strength data KD is rewritten to the 4 quasi-stroke strength data KDa.

Thereafter, the above operation is performed every f times when the clock pulse ψ is supplied to the CPU 4. Note that if no event is detected, an event block EB is created in r7. do not have. Then, a certain number of event blocks EB in 几AM7
When the event block E13 in the RAM 7 is written, the CPU 4 transfers the event block E13 in the RAM 7 to the floppy disk device 9 via the disk controller 10, and writes it to the floppy disk of the same value ray 9.

In the above-described embodiment, the keyswitch 2 detects the strong key stroke (formerly 0), but the present invention is of course also applicable to the case where Shingo is detected by another sensor (for example, a microphone). Furthermore, the present invention can be applied to cases where a musical score is inputted using the keyboard 1, or when the sound of a record is recorded using a microphone and recorded as data.

As explained above, according to the present invention, n, B sound - sewing information is converted into 丞4#ji′L data and recorded in the storage unit, so that the sensor for detecting the volume changes due to design changes, etc. Even in this case, there is an advantage that it is not necessary to change the design of the data reproducing device, and it is also possible to reproduce the continuous data recorded by sensors with different characteristics using the same data reproducing device. Benefits can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
Figure 2 is a diagram showing the event block EB created in l(, A to 17) in Figure IX1, Figure 3 (a), (O
O is a diagram showing the format and data content of event data ED in the same event block BB. 3...Key data generation circuit, 4. ,,,,C
PU (central processing bag Vx,), 7...f'LAM
(Random access memory), 8...ROM
(Read-only memory), 9...Floppy disk device. Applicant: Nippon Musical Instruments Manufacturing Co., Ltd.

Claims (1)

[Claims] In a hair performance data recording device that creates performance data based on musical tone information such as pitch information and volume information, and records the created performance data in a storage unit, conversion that converts the sound jd information into reference f amount data. A performance data recording device comprising means for converting the volume information into reference volume data by the converting means and recording the data in the storage section.