User manual

Automation Protocol Audio Commands (old)
Miranda Technologies Ltd Page 75
Audio Commands (old)
Note: The commands in this section are largely deprecated and ONLY
apply to Imagestore 2 with ‘Easysound’ option disabled.
More recent Imagestore products utilise the Easysound audio
model which is described on page 159.
Audio commands are applicable to systems that have the Easysound audio
mixer layer fitted. The audio system is viewed as a matrix with variable gain
cross-points. The mixes output from the matrix are then patched to physical
outputs, each of which has a master gain (fade to silence) control. Each of the
mix matrix inputs is also available at the patch layer to allow pre-mix
monitoring. See the diagram on page 83.
The inputs into the matrix may be selected from embedded audio or from
physical AES inputs. The outputs from the patcher stage are available as AES
and optionally as audio embedded into the program SDI output.
In practice there are physical constraints which limit the maximum number of
logical outputs, the maximum number of physical outputs and the maximum
number of inputs which may simultaneously contribute to any given logical
output. This depends on the hardware purchased.
Inputs may be treated as mono or stereo. Inputs may be phase inverted or
silenced.
Mixer outputs are controlled by sending sets of gain, input and time values
for each input fader to be changed. Mix matrix outputs can be specified as
left, right or stereo.