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author | Paul B Mahol <onemda@gmail.com> | 2022-03-17 10:18:08 +0100 |
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committer | Paul B Mahol <onemda@gmail.com> | 2022-03-17 11:02:07 +0100 |
commit | 242c07982ad523b2e0f928a204a6f2d293a956d7 (patch) | |
tree | cee543dfb7aeb11a2a2224f00216ebd1f392533b /doc | |
parent | 44fb2463a3ba4a1496648cf74038e96fad448713 (diff) |
doc/filters: add some afftdn examples
Diffstat (limited to 'doc')
-rw-r--r-- | doc/filters.texi | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index f25c5c1640..d70ac3e237 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1396,6 +1396,30 @@ Default value is @code{none}. This filter supports the some above mentioned options as @ref{commands}. +@subsection Examples + +@itemize +@item +Reduce white noise by 10dB, and use previously measured noise floor of -40dB: +@example +afftdn=nr=10:nf=-40 +@end example + +@item +Reduce white noise by 10dB, also set initial noise floor to -80dB and enable automatic +tracking of noise floor so noise floor will gradually change during processing: +@example +afftdn=nr=10:nf=-80:tn=1 +@end example + +@item +Reduce noise by 20dB, using noise floor of -40dB and using commands to take noise profile +of first 0.4 seconds of input audio: +@example +asendcmd=0.0 afftdn sn start,asendcmd=0.4 afftdn sn stop,afftdn=nr=20:nf=-40 +@end example +@end itemize + @section afftfilt Apply arbitrary expressions to samples in frequency domain. |