allpass

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"