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8n
9n
Bn
FO
F7
Note Off:
Note On:
Polyphonic Aftertouch:
Control Change:
Program Change:
Channel Aftertouch:
Pitch Wheel:
System Exclusive:
End Of Exclusive (EOX)
The note number indicates which key was released, and velocity indi-
cates how quickly it was released. Very few keyboards have Release
Velocity Sensitivity. (The Sequential Circuits Prophet T8 is one.) Most
other keyboards
(such as the Yamaha
DX series) send a Note On
message with a velocity of 0 to indicate a Note Off.
The note number indicates which key was pressed, and velocity indi-
cates how hard it was hit. On keyboards which do not have a velocity
sensitive keyboard (such as the DX21), a medium value of 40 is sent.
A Note On message with a velocity of 0 is the same as a Note Off
message.
The note number indicates which key is being pressed, and pressure
indicates how hard that key is being pressed. (le. each key can send
independent aftertouch messages.) Of all Yamaha keyboards, only the
DX1
is able to send (and react to) this message.
The control number indicates which controller is being moved, and the
data indicates the position of the controller.
In*this chart, control
changes 01 — 07 are "continuous controllers" (slider or wheel-type
controllers.) They carry data in the range of 00-7F.
Control changes 40-43 are on/off switch-type controllers, and carry
data of either O or 7F.
Control changes 7A-7F are a special type of control change called
Mode
Messages, and usually carry a fixed data byte. They tell the
receiving tone generator how to behave. The way in which these mes-
sages are interpreted will depend on the device. (See the MIDI Imple-
mentation Chart for your tone generator or synthesizer.)
This tells the receiving device to switch programs (memories).
Also called "Common Aftertouch", this is found on the DX7.
To provide finer resolution, this data is sent in two bytes, first the Least
Significant Byte (LSB) and then the Most Significant Byte (MSB).
Yamaha tone generators and synthesizers ignore the LSB.
After FO must come an identification number which has been assigned
to each manufacturer. Yamaha's number is 43. What comes between
this message
and F7 (End of Exclusive)
is completely up to each
manufacturer (but each byte must be between 0 and 7F). Yamaha uses
System
Exclusive messages to transmit voice data, sequence
data,
rhythm pattern data, bulk memory data of all kinds, and many other
useful things. See the System Exclusive format chart for your device.
This marks the end of a System Exclusive message.
~30-
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