YMF721 Datasheet, PDF (30/41 Pages) LSI Computer Systems – FM + Wavetable Synthesizer LSI

YMF721
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> <Control No.> <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.
0
32
Parameter
Bank Select MSB
Bank Select LSB
Data range
0 or 127
don’t care
b) Modulation
This is a message to inform the depth of Vibrato.
Control No.
1
Parameter
Modulation
Data range
0 to 127
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July 10, 1997