AMX AXB-MIDI User Manual

Page 14

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Programming

10

AXB-MIDI MIDI Interface

SEND_STRING MIDI,"$B0 + (MIDI_CHANNEL - 1), CONTROLLER, VALUE"

Specific example set volume to 50% on MIDI ch 5:

MIDI_CHANNEL = 5

5 - 1 = 4

$B0 + 4 = $B4,

The standard MIDI Volume controller is 7,

127 * 50% = 64 (approximately), thus the send string,

SEND_STRING MIDI,"$B4, 7, 64"

Selected MIDI controller numbers:

BANK SELECT MSB = 0

VOLUME = 7

PAN = 10

EXPRESSION = 11 (* A SECOND VOLUME CONTROL *)

GENERAL PURPOSE CONTROLLER # 1 = 16

GENERAL PURPOSE CONTROLLER # 2 = 17

GENERAL PURPOSE CONTROLLER # 3 = 18

GENERAL PURPOSE CONTROLLER # 4 = 19

BANK SELECT LSB = 32

HOLD = 64 (* 2nd data byte of 63 or less = OFF,
64 or greater = ON *)

REVERB SEND = 91

EFFECTS 2 DEPTH = 92

CHORUS SEND = 93

EFFECTS 4 DEPTH = 94

EFFECTS 5 DEPTH = 95

ALL SOUND OFF = 120 (* 2nd data byte is always "0" *)

RESET ALL CONTROLLERS = 121 (* 2nd data byte is always "0" *)

The Control change is denoted by status byte $B0 (for MIDI channel 1) through status byte $BF (for MIDI
channel 16), followed by two data bytes.

PRGM EX. 4

MIDI_CHANNEL = 6

6 - 1 = 5

$90 + 5 = $95

Note = 60

Velocity = 96, thus the send string,

SEND_STRING MIDI,"$95,60,96"

To turn the same note off:

SEND_STRING MIDI,"$95,60,0"

Specific example, Middle C (Note #60) on, on MIDI ch 6. If you're not sure what velocity to use try some-
thing between 64 (half) and 127(full), how about 96?

PRGM EX. 5

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