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author | Paul B Mahol <onemda@gmail.com> | 2014-06-24 12:35:37 +0400 |
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committer | Paul B Mahol <onemda@gmail.com> | 2015-04-11 23:39:43 +0300 |
commit | d2fc702ace340bb22290bc575a0194082dd00627 (patch) | |
tree | 30e6621ea03fedbe4e708ff612bc97c27471016f /doc/filters.texi | |
parent | 415f1fab8de78a465aa671904c9da0c343f7198f (diff) |
avfilter: add chorus filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'doc/filters.texi')
-rw-r--r-- | doc/filters.texi | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index b33379d08a..0f2e720df0 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1320,6 +1320,61 @@ front_center.wav -map '[LFE]' lfe.wav -map '[SL]' side_left.wav -map '[SR]' side_right.wav @end example +@section chorus +Add a chorus effect to the audio. + +Can make a single vocal sound like a chorus, but can also be applied to instrumentation. + +Chorus resembles an echo effect with a short delay, but whereas with echo the delay is +constant, with chorus, it is varied using using sinusoidal or triangular modulation. +The modulation depth defines the range the modulated delay is played before or after +the delay. Hence the delayed sound will sound slower or faster, that is the delayed +sound tuned around the original one, like in a chorus where some vocals are slightly +off key. + +It accepts the following parameters: +@table @option +@item in_gain +Set input gain. Default is 0.4. + +@item out_gain +Set output gain. Default is 0.4. + +@item delays +Set delays. A typical delay is around 40ms to 60ms. + +@item decays +Set decays. + +@item speeds +Set speeds. + +@item depths +Set depths. +@end table + +@subsection Examples + +@itemize +@item +A single delay: +@example +chorus=0.7:0.9:55:0.4:0.25:2 +@end example + +@item +Two delays: +@example +chorus=0.6:0.9:50|60:0.4|0.32:0.25|0.4:2|1.3 +@end example + +@item +Fuller sounding chorus with three delays: +@example +chorus=0.5:0.9:50|60|40:0.4|0.32|0.3:0.25|0.4|0.3:2|2.3|1.3 +@end example +@end itemize + @section compand Compress or expand the audio's dynamic range. |