Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 165)

MAESTRO Installation and Service Manual 165
3rd Step: Audio Sets
which table to use depends upon the planned operation and philosophy of
a given installation.
Note Input mapping of audio sources is done completely within the Maestro Pro-
cessor. This is especially useful for embedded sources where the audio and
video are locked together. When an external audio router is used, some
mapping functions can be done in the router rather than in the Maestro
product. Careful planning must be done to determine where the mapping is
best done in a given installation.
In general, remapping in the Audio Input tables is used for sources that do
not change dynamically or for those sources that have a few possible con-
figurations. (Audio Input sets are assigned to sources using the Input table,
page 191 .)
There are a number of primary uses for the Audio Input tables:
• Standard input mapping (1:1)
• Correcting format differences
• Audio group substitution
• Down-mix / up-mix mapping
• Combinations of all the above
Each of these categories is described below.
Standard Input Mapping (1:1)
The Audio Input table is really a matrix of inputs and outputs representing
the 16 input and 16 output channels. Each cell in the table can contain a gain
value in decibels (dB). A value of “0” means a unity gain value for that
input/output combination. The values are the contribution of the input
channel to the output channel. The range of values is blank or OFF, or a
value from -51.1 dB to 0 dB (Unity gain) with 0.1 dB resolution.
Standard or 1:1 input mapping has been the default input mapping in all
software versions before 1.3. This method will map the input channels to
the output channels one-to-one.
Figure 83 on page 166 shows 10 audio
channels which are spread across four audio groups; the input table maps
each input channel to the corresponding output channel.