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DSP SIS Commands
Many digital signal processor (DSP) functions; gain, mute, group masters, and a protected
configuration can be controlled using SIS commands. These commands follow the same
general rules as basic SIS commands, but the variables (
X/
) tend to be more complex.
Also, an understanding of the audio signal flow is helpful to understanding the commands.
Figure 66 shows the specific DSP functions available for SIS commands.
NOTE: Signal flow is described in greater detail in the section,
“Audio level, mix-point, processing blocks, and signal chains” on page 28.
c
a
bed
Figure 66. DSP Processors Addressable via SIS Commands
a
Mic/line input gain block (including gain and mute)
b
Pre-mixer gain block (including gain and mute)
c
Virtual return gain
d
Post-mixer trim (gain only)
e
Output Volume (including gain and mute)
DMP128 • SIS Programming and Control 124