JPH0287291U - - Google Patents
Info
- Publication number
- JPH0287291U JPH0287291U JP16581088U JP16581088U JPH0287291U JP H0287291 U JPH0287291 U JP H0287291U JP 16581088 U JP16581088 U JP 16581088U JP 16581088 U JP16581088 U JP 16581088U JP H0287291 U JPH0287291 U JP H0287291U
- Authority
- JP
- Japan
- Prior art keywords
- key
- pressed
- switches
- musical instrument
- keys
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011159 matrix material Substances 0.000 claims description 5
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案の一実施例に係る電子楽器の
全体構成図、第２図は実施例のメインのフローチ
ヤート、第３図は実施例の鍵盤押鍵処理のフロー
チヤート、第４図は従来技術における鍵盤押鍵処
理のフローチヤート、第５図は信号の回り込みを
説明するのに用いたキーマトリクス回路を示す図
である。
１……キーマトリクス回路、２……ＣＰＵ、Ｓ
Ｗ……キースイツチ、Ｄ……ダイオード。
Fig. 1 is an overall configuration diagram of an electronic musical instrument according to an embodiment of this invention, Fig. 2 is a main flowchart of the embodiment, Fig. 3 is a flowchart of keyboard key press processing of the embodiment, and Fig. 4 is a flowchart of the keyboard key press processing of the embodiment. FIG. 5, which is a flowchart of the keyboard key press processing in the prior art, is a diagram showing a key matrix circuit used to explain the wraparound of signals. 1...Key matrix circuit, 2...CPU, S
W...key switch, D...diode.
Claims (1)
子を介することなく複数のキースイツチをマトリ
クス状に接続したキーマトリクス回路手段を走査
して押鍵を検出する電子楽器の押鍵処理装置にお
いて、 前記キーマトリクス回路手段の走査時に、３個
以下のキースイツチが押鍵状態にあることを示す
信号が得られたときは、これらのキースイツチの
鍵に対して実際に押鍵があつたものとして処理す
る鍵処理手段を有することを特徴とする電子楽器
の押鍵処理装置。[Claim for Utility Model Registration] Pressure of an electronic musical instrument that detects key presses by scanning a key matrix circuit means in which a plurality of key switches are connected in a matrix without using a directional circuit element to prevent signal wraparound. In the key processing device, when a signal indicating that three or less key switches are in the depressed state is obtained when the key matrix circuit means is scanned, it is determined that the keys of these key switches are actually depressed. 1. A key press processing device for an electronic musical instrument, characterized in that it has a key processing means for processing keys as if the key is pressed as if the key was pressed as if the key was pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16581088U JPH0287291U (en) | 1988-12-23 | 1988-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16581088U JPH0287291U (en) | 1988-12-23 | 1988-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0287291U true JPH0287291U (en) | 1990-07-10 |
Family
ID=31452637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16581088U Pending JPH0287291U (en) | 1988-12-23 | 1988-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0287291U (en) |
-
1988
- 1988-12-23 JP JP16581088U patent/JPH0287291U/ja active Pending
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