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doc/filters: add some afftdn examples
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@ -1396,6 +1396,30 @@ Default value is @code{none}.
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This filter supports the some above mentioned options as @ref{commands}.
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This filter supports the some above mentioned options as @ref{commands}.
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@subsection Examples
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@itemize
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@item
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Reduce white noise by 10dB, and use previously measured noise floor of -40dB:
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@example
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afftdn=nr=10:nf=-40
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@end example
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@item
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Reduce white noise by 10dB, also set initial noise floor to -80dB and enable automatic
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tracking of noise floor so noise floor will gradually change during processing:
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@example
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afftdn=nr=10:nf=-80:tn=1
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@end example
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@item
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Reduce noise by 20dB, using noise floor of -40dB and using commands to take noise profile
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of first 0.4 seconds of input audio:
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@example
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asendcmd=0.0 afftdn sn start,asendcmd=0.4 afftdn sn stop,afftdn=nr=20:nf=-40
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@end example
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@end itemize
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@section afftfilt
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@section afftfilt
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Apply arbitrary expressions to samples in frequency domain.
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Apply arbitrary expressions to samples in frequency domain.
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