JPS5933495A - Key asigner for electronic musical instrument - 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 key assigner for use in electronic musical instruments.

The present invention is characterized in that by pressing a key, the key is set at different positions, and in response to the upper contact and the lower contact of the switch f: horizontal 1jSj, the address representing the same key name is set. Assuming that the code is already memorized and there is a blank channel,
Store it in the empty channel of the memory device,
By creating a touch sense counter 1ffi in response to the time from when one of the two contacts is closed until the other contact is closed and turned off, that is, the speed at which the key is pressed, the storage address is determined. The present invention provides a key assigner that obtains information that enables creation of a chord and various sound changes corresponding to the press @ speed 1 drive.

In addition, the present invention detects the opening and closing of the key (・When the key is opened, it is detected ignoring chaku, and when it is closed, it is detected by ignoring the chaku, and when it is closed, it is detected without detecting the lock. A preferred embodiment of the touch sensitive key assigner will be described in detail.

FIG. 1 is a block diagram of the present key assigner. This device generates multiple musical tones simultaneously, exchanges information directly with an external CPU, and performs data processing, so various counters, logic circuits, and storage devices are shared in a time-sharing manner and in synchronization with the external CPU. Furthermore, a clock pulse for controlling internal operations is required.

The pulse generator 1 generates an internal operating clock pulse using the external clock ALEjN. Channel counter 2 operates with the ALFi signal, and includes touch count section A and release count section B.
It is used as the clock for the soft register and as the clock for the switch key scan circuit.

If the key f:Bfa of 96/a is a block and all 12 blocks are taken as 1 secunion, the first key scan counter 5 is a counter that scans 8 keys in 1 block, and the second key scan counter 4 is a counter that scans 1 secunion. This is a counter that scans and drives each block. The key detection circuits 5 and 6 are upper and lower detection circuits that respectively detect which key is pressed tl. Marilix 7 and 8I''
i. This key assigner uses a key switch (not shown) which has contacts at different levels, namely 2 an upper contact and a lower contact, with 7 being a diode matrix for the upper contact and 8 being a lower contact. be. RAM address decoder 1
0 is the first. 2nd Keith Gyan Cow: yp5.4 output iaA+, q2z touch address, and decoder 9
The key-on address of all the RAMs 22 is designated by the output AC of the controller 23. The upper key register 11 and the lower key register 12 are 96-bit soft registers that shift by 7 based on the output of the first key gear counter 3. That is, it is a soft register that is soft for each note, and is interconnected with the controller 24. The key-on/sister 13 is also a 96-bit shift register, and the output of the first key scan counter 3 is 7.
The signal is output to the switch 21 and stored in the RAM 22 every time 8 bits are shifted.

That is, each address is stored in the RAM. The touch counter circuit section A includes a key name registration register 17° touch counter 19 . The busy register 18 is a circuit that operates a touch sense counter in accordance with the key pressing speed. It is interconnected with a controller 26, and the output of the touch counter 19 is sent to a touch data conversion ROM 20.

The release counter circuit section B includes a key name registration register 14,
Release counter 16. This circuit includes a busy register 15 and takes into account chatter after the key is turned off. interconnected with the controller. - The touch data conversion ROM 20 is a ROM that converts the touch data obtained from the touch counter 19 into a necessary musical tone expression. The key opening/closing touch data switch 21 switches respective data using switches 16 A and 0, and outputs and stores the data in the RAM 22 .

The RAM 22 stores key data, ie, key 0N10FF.
This is a storage device that stores touch data in addresses and exchanges information with the CPU after 1a. The controller 23 receives the outputs of the respective vehicle detectors 5 and 6, and performs full control in all key states.

A, B, ,'0ilj in FIG. 2 are the address contents in the RAM.

Data for key 0N10FF of 64 keys is stored in eight addresses from \7 to \FE. In other words, each address has 8 sounds from C2 to D? ``j'' is sequentially specified as data at eight addresses.Here, when the key is ON, the data is 1l-1', and when the key is OFF, it is 1.6
For keys 5 to 94, 8 tones are similarly stored in four addresses from 2F7 to 2FK. touch data 1
, one touch data per note is stored in 64 addresses from 100 to 13F from 02 to G#7. From E7 to B9, 32 from 300 to 31F
Similarly stored in the address. With this RAM, the external QPTJ can perform 4A using the same method as scanning the keyboard.
By scanning M, key data f: can be obtained.

FIG. 3 is an operation flowchart of the controller. Key scan out represents the current state of the keyboard, and key register out represents the state at the time of the previous scan with the output in the set key register. U is the upper contact state, L is the lower contact state, 1 is closed, \ is open.

Now, I will explain the case where one key is pressed f'' when no keys are pressed.

When the key press starts, DSO/LEIO becomes 1△
, 'Q, /1, 1/1, If the touch counter TC is empty, set 1 to TOB and write UR8/LR8=1. to the key register. To, store the talent. There is no operation unless the touch counter is empty.

Next, after one scan, the process moves to the case where the key register is 1Δ. Here, if the key is released immediately after being pressed, USO/LSO = %
If only the upper contact is closed, USO/LSO = 1
10, When only the lower contact is closed uS'o/Lso=\
/1. The case where both the two contacts are closed is considered. If Uso/Lso=Q/\, cancel the response, reset the touch counter busy, and write ' to the key register.
Store J RS / L RS =\/\. US
When O/LSO=110, the key press speed is being detected and 1 is added to TC for each scan. When To exceeds 255, the pushing speed test IJ eyebrow becomes 1st in middle school.

In other words, push;! l! Speeds up to 255', 8-bit
Information on Soto. USO/LSO= 1/1, (
In the case of 1/1, detection of key press speed is stopped and TOB
R'i IJ upper set, UR8/LR in key register
82 1/1 All 1/1. In other words, the touch sense is counted during this time.

Next, the process moves to the case where the key register after -scanning is 1/1. Here, it is divided into a case where USO/LSO=1/1 and a case where USO/LSO is other than 1. 1/1, chiming, keys being pressed, no change in operation. If the value is other than 1/1, the key release is started, and if the release counter Ua is empty, the release counter busy register RBR is set and the key registers TJ, R8/LR82U/1 are set. Re
If is not empty, there is no action.

Next, the process moves to the case where the key register after -scanning is 0/1. Here, the case is divided into a case where USO/LSO'=17i and a case other than that. In the case of 1/1, since the key was pressed even though the key was released, the response is canceled, R13R is reset, and U,RO/SRO,=1/1 is set in the key register. 1 other than 1/1, the key is being released, the release counter counts 15, there is no change in the creation, and when RC reaches 15, the key is released and the key register IJRO/L is released.
Set RO=010. That is, here P
# Chatter at the time of the key is taken into consideration.

As described above, this key assigner is equipped with a controller and a RAM for recording key data, and these allow all key press states to be matched, allowing the external CPU to register keys simply by exchanging information directly with the RAM. It is a touch sensitive key assigner that allows you to know the next generation.

[Brief explanation of drawings]

Figure 1 is a block diagram of this key assigner, and A and B in Figure 2.
, O is a table of addresses and data of the key data collection RAM, and 6L No. 31g is a flow showing the operation of this key assigner. 1... Control pulse generator 2... Channel Counter 34...Key scan counter 5...
Upper key detection circuit 6... Lower key detection circuit 7... Upper key matrix 8... Lower key matrix 9... Decoder' 10...・RAM address decoder 11...
...Upper key register 12...Lower key register 13...Key-on register 14.17...User name registration register 15...Release count busy register 16
...Release counter 18...Touch count busy register 19.
...Touch counter 20...Touch data conversion ROM21...
...Data converter 22 ...RAM 23 ...Controller 24 ...CPU A ...Touch counter circuit B ...Release counter circuit section AC...
・Address, data control Applicant Daini Seidokusha Co., Ltd. Patent attorney Tsutomu Mogami

Claims (1)

[Claims] An oscillation circuit for generating a reference clock signal, an output signal from f'L○pU, and an output signal from the CPU are input to this oscillation circuit, and are connected to the key scan counter of the complex. fL ft channel counter,
A release counter section and a touch counter section connected to the key scan counter, a controller section connected to the release counter section and touch counter section, and a key for inputting a key detection code to the controller section. 1￥f from the detection unit and the controller unit
It is equipped with a RAM for storing key information for inputting information, and a means for exchanging information with the CPU connected to this RAM, so that the CPU can directly exchange information with the RAM about all the states and conditions of the key. This is a key assigner for Ninzi musical instruments, which is structured so that each of the nine states is twilled by doing so.