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channelmix: add option to filter FC

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Add an option to do a lowpass filter on the FC channel to isolate
the voices better and move the higher frequencies to the stereo
channels.

See #861
This commit is contained in:
Wim Taymans 2022-03-01 11:30:12 +01:00
parent 5b3388e4ac
commit 23db50630d
7 changed files with 26 additions and 4 deletions
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1
spa/plugins/audioconvert/channelmix-ops.h
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@ -74,6 +74,7 @@ struct channelmix {
float freq; /* sample frequency */
float lfe_cutoff; /* in Hz, 0 is disabled */
float fc_cutoff; /* in Hz, 0 is disabled */
float rear_delay; /* in ms, 0 is disabled */
float widen; /* stereo widen. 0 is disabled */
uint32_t hilbert_taps; /* to phase shift, 0 disabled */