YMF721 datasheet(30/41 Pages) LSI

30 / 41 page

YMF721

July 10, 1997

- 30 -

Supplementary Information 2 (MIDI Data Format)

1. General

1-1. Application

The following MIDI information applies to the YMF721(OPL4-ML2).

1-2. Applicable Standards

MIDI 1.0 Standard

2. Channel Message

2-1. Send

YMF721(OPL4-ML2) has no transmitting function.

2-2. Receive

2-2-1. Note On/Off

This is a message to inform playing information.

Note On : 9nH kkH vvH

Note Off : 9nH kkH 00H or 8nH kkH vvH

*n : MIDI Channel No.

*kkH : Note No., vvH : Velocity (00 - 7F)

Received note range = C-2 ~ G8 (Note On only)

Verocity range = 1 ~ 127

2-2-2. Control Change

<BnH>

<Data>

a) Bank Select

This is a message to select a bank of the designated receiving channel. However, the channel 10 does

not receive bank select since it is fixed to drum kit.

The normal voice is selected when Bank Select MSB is “0”, and drum kit when “127”.

After Bank Select MSB is received, it is necessary to receive Program Change.

Control No.

Parameter

Data range

Bank Select MSB

0 or 127

Bank Select LSB

don’t care

b) Modulation

This is a message to inform the depth of Vibrato.

Control No.

Parameter

Data range

Modulation

0 to 127

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