Grass Valley Maestro Master Control Reference Manual v.2.4.0 - Manual (Page 73)

MAESTRO — Automation Interface Protocol Technical Reference Manual 73
SET_AUDIO (Set channel related audio parameters)
Maestro applicability:
<channel bits> = 00-07 (hex, one byte).
Specifies the Audio Groups affected by the command.
bit 7-bit3 = reserved
bit 2 = Audio Group 3
bit 1 = Audio Group 2
bit 0 = Audio Group 1
<ratio> = 00-FF (hex, one byte)
When = Mixer 1 or Mixer 2, specifies the audio ratio to be applied on all audio channels, or reports the
current ratio of CH1/2 on a reply . Saturn audio ratio is -18.0 dB through 18.0 dB in 0.375 (3/8) dB steps where
FE-FF is +INF dB. The Maestro range is from 0 dB to 24.0dB in .1dB increments and +INF. The Range sup-
ported by this command is from 0 dB to18.0dB in .1dB increments and +INF. Maestro does not support negative
(-) dB values.
00 = Audio Ratio NOP IF_NULL
01-7F = Audio ratio set to 0 db.
80-FD = Audio ratio scaled to 0.1 dB through 18.0 dB in 0.1dB increments rounded to the lower whole
0.1 dB step.
FE-FF = Audio ratio set to +INF
<bal> = 00, 01-FF (hex, one byte)
On a stereo channel, specifies the audio balance or reports the current balance on a reply.
00 = Audio balance NOP
01-FF = Audio balance linearly corresponding to 10.0 dB Left through 10.0 dB Right. Balance
changes in 0.375 (3/8) dB steps (Saturn compatibility) but will be applied as the lower whole 0.1 dB
step in Maestro.
<gain> = 00, 01-FF (hex, one byte)
Specifies the audio gain or reports the current audio gain on a reply.
00 = Audio gain NOP
01-FF = Audio gain linearly corresponding to -24.0 dB through +24.0 dB. Gain changes in
0.375 (3/8) dB steps (Saturn compatibility) but will be applied as the lower whole 0.1 dB step in Mae-
stro.