JPH0477198U

JPH0477198U -

Info

Publication number: JPH0477198U
Application number: JP11980090U
Authority: JP
Priority date: 1990-11-15
Filing date: 1990-11-15
Publication date: 1992-07-06

Description

[Brief explanation of drawings]

第１図は、本考案の一実施例に係る自動伴奏装
置を適用した電子鍵盤楽器の全体の回路構成を示
すブロツク図、第２図は、第１図に示した鍵盤の
伴奏鍵域の配置例を示す図、第３図は、第２図に
示した鍵盤の伴奏鍵域の押鍵の組合せによるコー
ド種及びその根音のＣＰＵによる判別例を示す図
、第４図は、第１図に示したＲＯＭに記憶されて
いる伴奏パターンの例を示す図、第５図は、第１
図に示したＲＯＭに記憶されているピツチ・チエ
ンジ・テーブルを示す図、第６図は、第２図に示
した鍵盤の伴奏鍵域の押鍵に伴つて発生される伴
奏パターンの一例を示す図、第７図は、第１図に
示した回路を内蔵した電子鍵盤楽器の外観図、第
８ａ乃至ｃは、本考案の一実施例に係る自動伴奏
装置を適用した電子鍵盤楽器の動作を説明するた
めのフロー・チヤート、第９図は、コード変換処
理を説明するためのフロー・チヤートである。１……ＣＰＵ、２……ＲＯＭ、３……鍵盤、４
……スイツチ群、５……音源部、６……Ｄ／Ａ変
換部、７……増幅器、８……スピーカ。 FIG. 1 is a block diagram showing the overall circuit configuration of an electronic keyboard instrument to which an automatic accompaniment device according to an embodiment of the present invention is applied, and FIG. 2 is a layout of the accompaniment key range of the keyboard shown in FIG. 1. FIG. 3 is a diagram showing an example of how the CPU determines the chord type and its root note based on the combination of keys pressed in the accompaniment key area of the keyboard shown in FIG. 2, and FIG. 4 is the diagram shown in FIG. FIG. 5 is a diagram showing an example of the accompaniment pattern stored in the ROM shown in FIG.
FIG. 6 is a diagram showing a pitch change table stored in the ROM shown in the figure, and FIG. 6 shows an example of an accompaniment pattern generated in response to a key depression in the accompaniment key range of the keyboard shown in FIG. Fig. 7 is an external view of an electronic keyboard instrument incorporating the circuit shown in Fig. 1, and Figs. Flow Chart for Explanation FIG. 9 is a flow chart for explaining code conversion processing. 1... CPU, 2... ROM, 3... Keyboard, 4
...Switch group, 5...Sound source section, 6...D/A conversion section, 7...Amplifier, 8...Speaker.

Claims

[Scope of Claim for Utility Model Registration] Pitch specifying means consisting of a plurality of pitch operators for specifying the pitch of a musical tone to be generated, and a code in response to the operation of the pitch operator of the pitch specifying means. a first determining means for determining the seed and root; a second determining means for determining whether the chord determined by the first determining means is an inversion; and a reference chord type and root. Accompaniment pattern storage means for storing an accompaniment pattern consisting of a chord pattern expressed by sound and a bass pattern accompanying the chord pattern; a chord pattern of the accompaniment pattern stored in the accompaniment pattern storage means; a first converting means that converts the pitch with respect to the bass pattern based on the chord type and root note determined by the first determining means; and a chord specified by the second determining means is in an inverted form. If it is determined that the bass pattern of the accompaniment pattern converted by the first converting means is converted to the lowest pitch of the pitch operator operated when the chord is specified by the pitch specifying means. automatic accompaniment characterized by comprising: a second converting means for converting, and an accompaniment sound generating means for generating an accompaniment sound based on the accompaniment pattern converted by the first converting means and the second converting means. Device.