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Document sinesupress audio filter, thanks to the help of Michael Niedermayer and Jan Knutar. 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@18085 b3059339-0415-0410-9bf9-f77b7e298cf2
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gpoirier 2006-04-13 21:25:37 +00:00
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@ -4069,6 +4069,23 @@ Sine function delta, use very low values to hear the sweep.
.PD 1
.
.TP
.B sinesupress[=freq:delay]
Remove a sine at the specified frequency.
Usefull to get rid of the 50/60hz noise on low quality audio equipment.
It probably only works on mono input.
.PD 0
.RSs
.IPs <freq>
The frequency of the sine which should be removed (in Hz) (default: 50)
.IPs <decay>
Controls the adaptivity (a larger value will make the filter adapt to
amplitude and phase changes quicker, a smaller value will make the
adaptation slower) (default: 0.0001).
Reasonable values are around 0.001.
.RE
.PD 1
.
.TP
.B hrtf[=flag]
Head-related transfer function: Converts multichannel audio to
2 channel output for headphones, preserving the spatiality of the sound.