Mixing Parameters - XMOS xCORE-200 Multi-channel Audio board Design Manual

USB Audio Design Guide
Macro VOLUME_RES
Description The resolution of the volume control in db as a 8.8 fixed point number.
Default: 0x100 (1db)

7.1.9 Mixing Parameters

Macro MIXER
Description Enable "mixer" core.
Default: 0 (Disabled)
Macro MAX_MIX_COUNT
Description Number of seperate mixes to perform.
Default: 8 if MIXER enabled, else 0
Macro MIX_INPUTS
Number of channels input into the mixer.
Description
Note, total number of mixer nodes is MIX_INPUTS * MAX_MIX_COUNT
Default: 18
Macro MIN_MIXER_VOLUME
The minimum volume setting for the mixer unit above -inf.
Description
This is a signed 8.8 fixed point number that must be strictly greater than -128
(0x8000)
Default: 0x8100 (-127db)
Macro MAX_MIXER_VOLUME
Description The maximum volume setting for the mixer.
This is a signed 8.8 fixed point number.
Default: 0x0000 (0db)
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