Nevion FRS-HD-XMUX4 - Manual (Page 24)

FRS-HD-XMUX4 Rev. C
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The sum products ( (L+R)/2 and MS) are reduced in level by 6 dB to avoid any
possibility of clipping.
Audio gain
Audio gain is a 16 bit value that can be set for each stereo pair going into the audio
processing block. The gain range is set to [+96dB, -96dB] with a gain step of 0.1dB.
Note that non-audio data is ignored and left unchanged by the gain
function.
5.17 Audio embedder
Figure 18: Multicon GYDA view of the audio embedders.
The audio embedder can be enabled per group in Multicon GYDA. When a group is
disabled the audio inside that group is removed.
When in SD mode, a 24bit sound signal can be reduced to 20bit through Multicon
GYDA control. This effectively removes the four least significant bits of the signal. The
audio control package is left unchanged, as the bit range is still present.
The audio control package can also be switched on and off in SD mode through
Multicon GYDA control.
The audio embedder can also be switched off altogether. In this mode the audio
embedded in the video input is left completely unaltered.