Setting Audio Levels
The mix-point level is controlled using SIS commands. The commands template follows a
similar structure as mute and unmute commands.
The audio conversion tables are the same for all mix-points (see table 2 beginning on
page 149). Although a greater range is shown in the table, the minimum and maximum
levels are the same for all mix-points (–35.0 to +25.0dB).
To select the mix-point, use the table 3 beginning on page 175 to find the specific
mix-point. In this example, the audio level of mix-point input 1 to output 1 is set to -10 dB.
The audio level control and mix-point selection formula is:
EGX6)*X6!AU}
where X6) is the mix-point location and X6! is the signal level. The mix-point location
according to table 3 on page 175 is 20000 and the SIS conversion for -10dB from
table2 on page 149 is 1948 making the SIS command EG20000*1948AU. This sets
the mix-point level at input 1 to output 1 to -10 dB.
To return the signal level back to default, use the same formula:
EG20000*2048AU sets the level back to 0 dB.
In this manner any mix-point can be selected and the signal level between its input and
output changed within the range of - 35 to +25 dB.
DMP128 • Reference Information 172
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