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doc/filters: update biquad filters with commands section

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
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Paul B Mahol 2017-12-18 15:24:00 +01:00
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doc/filters.texi
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@ -1136,6 +1136,23 @@ Specify the band-width of a filter in width_type units.
Specify which channels to filter, by default all available are filtered.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change allpass frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change allpass width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change allpass width.
Syntax for the command is : "@var{width}"
@end table
@section aloop
Loop audio samples.
@ -1876,6 +1893,23 @@ Specify the band-width of a filter in width_type units.
Specify which channels to filter, by default all available are filtered.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change bandpass frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change bandpass width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change bandpass width.
Syntax for the command is : "@var{width}"
@end table
@section bandreject
Apply a two-pole Butterworth band-reject filter with central
@ -1908,6 +1942,23 @@ Specify the band-width of a filter in width_type units.
Specify which channels to filter, by default all available are filtered.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change bandreject frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change bandreject width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change bandreject width.
Syntax for the command is : "@var{width}"
@end table
@section bass
Boost or cut the bass (lower) frequencies of the audio using a two-pole
@ -1947,6 +1998,27 @@ Determine how steep is the filter's shelf transition.
Specify which channels to filter, by default all available are filtered.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change bass frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change bass width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change bass width.
Syntax for the command is : "@var{width}"
@item gain, g
Change bass gain.
Syntax for the command is : "@var{gain}"
@end table
@section biquad
Apply a biquad IIR filter with the given coefficients.
@ -1955,6 +2027,20 @@ are the numerator and denominator coefficients respectively.
and @var{channels}, @var{c} specify which channels to filter, by default all
available are filtered.
@subsection Commands
This filter supports the following commands:
@table @option
@item a0
@item a1
@item a2
@item b0
@item b1
@item b2
Change biquad parameter.
Syntax for the command is : "@var{value}"
@end table
@section bs2b
Bauer stereo to binaural transformation, which improves headphone listening of
stereo audio records.
@ -2584,6 +2670,27 @@ equalizer=f=1000:t=q:w=1:g=2,equalizer=f=100:t=q:w=2:g=-5
@end example
@end itemize
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change equalizer frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change equalizer width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change equalizer width.
Syntax for the command is : "@var{width}"
@item gain, g
Change equalizer gain.
Syntax for the command is : "@var{gain}"
@end table
@section extrastereo
Linearly increases the difference between left and right channels which
@ -2983,6 +3090,23 @@ The default is 0.707q and gives a Butterworth response.
Specify which channels to filter, by default all available are filtered.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change highpass frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change highpass width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change highpass width.
Syntax for the command is : "@var{width}"
@end table
@section join
Join multiple input streams into one multi-channel stream.
@ -3281,6 +3405,23 @@ lowpass=c=LFE
@end example
@end itemize
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change lowpass frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change lowpass width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change lowpass width.
Syntax for the command is : "@var{width}"
@end table
@section lv2
Load a LV2 (LADSPA Version 2) plugin.
@ -4162,6 +4303,27 @@ Determine how steep is the filter's shelf transition.
Specify which channels to filter, by default all available are filtered.
@end table
@subsection Commands
This filter supports the following commands:
@table @option
@item frequency, f
Change treble frequency.
Syntax for the command is : "@var{frequency}"
@item width_type, t
Change treble width_type.
Syntax for the command is : "@var{width_type}"
@item width, w
Change treble width.
Syntax for the command is : "@var{width}"
@item gain, g
Change treble gain.
Syntax for the command is : "@var{gain}"
@end table
@section tremolo
Sinusoidal amplitude modulation.