| Status |
Data Byte(s) |
Description |
| D7----D0 |
D7----D0 |
|
Channel Voice Messages
|
| 1000cccc |
0nnnnnnn
0vvvvvvv |
Note Off event.
This message is sent when a
note is released (ended).
(nnnnnnn) is the note number.
(vvvvvvv) is the velocity. |
| 1001cccc |
0nnnnnnn
0vvvvvvv |
Note On event.
This message is sent when a
note is depressed (start).
(nnnnnnn) is the note number.
(vvvvvvv) is the velocity. |
| 1010cccc |
0nnnnnnn
0vvvvvvv |
Polyphonic Key Pressure (After-touch).
This message is sent when the pressure
(velocity) of a previously
triggered note changes.
(nnnnnnn) is the note number.
(vvvvvvv) is the new velocity. |
| 1011cccc |
0ccccccc
0vvvvvvv |
Control Change.
This message is sent when a controller
value changes. Controllers include devices
such as pedals and levers.
Certain controller numbers are reserved
for specific purposes. See Channel Mode Messages.
(ccccccc) is the controller number.
(vvvvvvv) is the new value. |
| 1100cccc |
0ppppppp |
Program Change.
This message sent when the patch number changes.
(ppppppp) is the new program number. |
| 1101nnnn |
0ccccccc |
Channel Pressure (After-touch).
This message is sent when the channel pressure
changes. Some velocity-sensing keyboards do not
support polyphonic after-touch. Use this
message to send the single greatest velocity
(of all te current depressed keys).
(ccccccc) is the channel number. |
| 1110nnnn |
0lllllll
0mmmmmmm |
Pitch Wheel Change.
This message is sent to indicate a change in the
pitch wheel. The pitch wheel is measured by a
fourteen bit value. Center (no pitch change) is
2000H. Sensitivity is a function of the
transmitter.
(llllll) are the least significant 7 bits.
(mmmmmm) are the most significant 7 bits. |
Channel Mode Messages
(See also Control Change, above) |
| 1011nnnn |
0ccccccc
0vvvvvvv |
Channel Mode Messages.
This the same code as the Control
Change (above), but implements Mode
control by using reserved controller
numbers. The numbers are:
Local Control.
When Local Control is Off, all devices
on a given channel will respond only to
data received over MIDI. Played data, etc.
will be ignored. Local Control On
restores the functions of the normal
controllers.
c = 122, v = 0: Local Control Off
c = 122, v = 127: Local Control On |
| |
All Notes Off. |
|
| |
|
When an All Notes Off is received,
all oscillators will turn off.
c = 123, v = 0: All Notes Off
(See text for description of actual
mode commands.)
c = 124, v = 0: Omni Mode Off
c = 125, v = 0: Omni Mode On
c = 126, v = M: Mono Mode On (Poly Off)
where M is the number of channels
(Omni Off) or 0 (Omni On)
c = 127, v = 0: Poly Mode On (Mono Off)
(Note: These four messages also cause
All Notes Off)..pa |
System Common Messages
|
| 11110000 |
0iiiiiii
0ddddddd |
System Exclusive.
This message makes up for all that MIDI
doesn't support. (iiiiiii) is a seven
bit Manufacturer's I.D. code. If the
synthesizer recognizes the I.D. code as
its own, it will listen to the rest of
the message (ddddddd). Otherwise, the
message will be ignored. System Exclusive
is used to send bulk dumps such as patch
parameters and other non-spec data.
(Note: Real-Time messages ONLY may be
interleaved with a System Exclusive.) |
| |
. . |
| |
. . |
| |
0ddddddd
11110111 |
| 11110001 |
|
Undefined. |
| 11110010 |
0lllllll
0mmmmmmm |
Song Position Pointer.
This is an internal 14 bit register that
holds the number of MIDI beats (1 beat=
six MIDI clocks) since the start of
the song. l is the LSB, m the MSB. |
| 11110011 |
0sssssss |
Song Select.
The Song Select specifies which sequence
or song is to be played. |
| 11110100 |
|
Undefined. |
| 11110101 |
|
Undefined. |
| 11110110 |
|
Tune Request.
Upon receiving a Tune Request, all analog
sythesizers should tune their oscillators. |
| 11110111 |
|
End of Exclusive.
Used to terminate a System Exclusive
dump (see above)..pa |
System Real-Time Messages
|
| 11111000 |
|
Timing Clock.
Sent 24 times per quarter note when
synchronization is required (see text). |
| 11111001 |
|
Undefined. |
| 11111010 |
|
Start.
Start the current sequence playing.
(This message will be followed with
Timing Clocks). |
| 11111011 |
|
Continue.
Continue at the point the sequence was
Stopped. |
| 11111100 |
|
Stop.
Stop the current sequence. |
| 11111101 |
|
Undefined. |
| 11111110 |
|
Active Sensing.
Use of this message is optional. When
initially sent, the receiver will expect
to receive another Active Sensing message
each 300ms (max), or it will be assume
that the connection has been terminated.
At termination, the receiver will turn off
all voices and return to normal (non-
active sensing) operation. |
| 11111111 |
|
Reset.
Reset all receivers in the system to
power-up status. This should be used
sparingly, preferably under manual
control. In particular, it should not
be sent on power-up. |
