Apply a two-pole all-pass filter with central frequency (in Hz) frequency, and filter-width width. An all-pass filter changes the audio’s frequency to phase relationship without changing its frequency to amplitude relationship.
The filter accepts the following options:
- frequency, f
-
Set frequency in Hz.
- width_type, t
-
Set method to specify band-width of filter.
- h
-
Hz
- q
-
Q-Factor
- o
-
octave
- s
-
slope
- k
-
kHz
- width, w
-
Specify the band-width of a filter in width_type units.
- channels, c
-
Specify which channels to filter, by default all available are filtered.
Commands
This filter supports the following commands:
- frequency, f
-
Change allpass frequency. Syntax for the command is : "frequency"
- width_type, t
-
Change allpass width_type. Syntax for the command is : "width_type"
- width, w
-
Change allpass width. Syntax for the command is : "width"