JPS59164094U

JPS59164094U - electronic musical instruments

Info

Publication number: JPS59164094U
Application number: JP5795383U
Authority: JP
Inventors: 智久石川
Original assignee: カシオ計算機株式会社
Priority date: 1983-04-20
Filing date: 1983-04-20
Publication date: 1984-11-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例の回路構成図、第２図は調
整用波形部１０の具体的回路の一例を示す図、第３図お
よび第４図は夫々、Ｄ／Ａ変換器１２のチェック時にお
ける正常または異常の場合の出力波形を示す図、第５図
ａ〜ｅは夫々、アンプ１５のチェック時における正常ま
たは異常の場合の出力波形を示す図である。１・・・・・・ＬＳＩチップ、２・・曲キースイッチ部
、３・・・・・・音響変換手段、４Ａ、　４Ｂ、　　４
Ｃ・・・・・・調整波形の指定スイッチ、５・・曲キー
スイッチ制御部、６・・・・・・音高周波数発生部、７
・・・・・・音色用ＲＯＭ。８・・・・・・乗算器、９・・・・・・エンベロープ発
生部、１゜・・・・・・調整用波形部、Ｇ１．　Ｇ２・
・・・・・ゲート回路、１１・・・・・・インバータ、
１２・・・・・・Ｄ／Ａ変換器、１３・・・・・・フィ
ルター、１４・・・・・・切換部、１５・・・・・・ア
ンプ、１６・・・・・・スピーカ、１７・・・・・・ス
イッチ、ＣＨＩ、ＣＨ２，ＣＨ３・・曲チェック端子。FIG. 1 is a circuit configuration diagram of an embodiment of this invention, FIG. 2 is a diagram showing an example of a specific circuit of the adjusting waveform unit 10, and FIGS. 3 and 4 are diagrams showing the D/A converter 12. FIGS. 5A to 5E are diagrams showing output waveforms when the amplifier 15 is normal or abnormal when the amplifier 15 is checked, respectively. 1... LSI chip, 2... Song key switch section, 3... Sound conversion means, 4A, 4B, 4
C...Adjustment waveform designation switch, 5...Tune key switch control section, 6...Tone pitch frequency generation section, 7
...ROM for tone. 8... Multiplier, 9... Envelope generation section, 1°... Adjustment waveform section, G1. G2・
...Gate circuit, 11...Inverter,
12...D/A converter, 13...Filter, 14...Switching section, 15...Amplifier, 16...Speaker, 17...Switch, CHI, CH2, CH3...Tune check terminal.

Claims

[Scope of utility model registration request]

(1) musical tone information generating means for digitally generating musical tone information according to inputted musical scale information; and acoustic converting means for emitting musical tones based on the output from the musical tone information generating means;
An electronic musical instrument comprising means for generating an adjustment waveform for adjusting the acoustic conversion means.

(2) The acoustic conversion means includes a D/A converter, a filter,
The electronic musical instrument according to claim 1 of the above-mentioned utility model registration claim, which comprises an amplifier and the like.