Yamaha DX21 Service Manual page 12

DX21
4. Reception Data
All MIDI data is received when the MIDI ON/OFF function is ON. When a specific
MIDNreceive channel has been selected using the MIDI RECV CH function, and
the OMNI mode is OFF, MIDI data will be received only on the specified channel.
MIDI data will be received on all channels when the OMNI mode is ON.
4-1. CHANNEL INFORMATION
4-1-1. Channel Voice Message
(1) Key off
Status
1OOOnnnn n=channel no.
Note no.
Okkkkkkk k=0(C-2) ~ 127 (G8)
Velocity
Ovvvvvvv
v is ignored
(2) Key On/Off
Status
1001nnnn n=channel no.
Note no.
Okkkkkkk
k=0(C-2) ~ 127(G8)
Velocity
Ovvvvvvv
v=0: key off
v=1 ~127: key on
The key on note level will vary according to the received velocity value. The range
of this instrument is C-1 to B6. If a higher or lower key number is received, it will
be output within the range limits. For example, recieved C7 through B7 data will
be output as notes in the C6 through B6 range.
(3) Control Change
Status
1011nnnn n=channel no.
Control no. Occccccc
Control code
Ovvvvvvv
a) Received whether MIDI CH INFO is ON or OFF
Control no.
Control code
C=64: Sustain sw.
V=0:OFF, 127:ON
Control no. Control code
C=1: modulation wheel
V'=0~127
C=2: breath control
V=0~127
C=5: portamento time V=0~127
C=6: data entry slider V=0~127
C=7: foot volume V=0~127
C=65: portamento sw. V=0:OFF, 127:ON
(4) Program Change
Status
11OOnnnn n=channel no.
Program no.
Oppppppp
Received only when MIDI CH INFO is ON. If received during the PLAY or PER¬
FORMANCE mode the voice or performance number will be changed accordingly.
The lower five bits of the program no. contain the voice or performance number.
(5) Pitch Bend
Status 111Onnnn n=channel no.
Code (LSB) Ouuuuuuu
Code (MSB)
Ovvvvvvv