stereotools

This filter has some handy utilities to manage stereo signals, for converting M/S stereo recordings to L/R signal while having control over the parameters or spreading the stereo image of master track.

The filter accepts the following options:

'level_in'

Set input level before filtering for both channels. Defaults is 1. Allowed range is from 0.015625 to 64.

'level_out'

Set output level after filtering for both channels. Defaults is 1. Allowed range is from 0.015625 to 64.

'balance_in'

Set input balance between both channels. Default is 0. Allowed range is from -1 to 1.

'balance_out'

Set output balance between both channels. Default is 0. Allowed range is from -1 to 1.

'softclip'

Enable softclipping. Results in analog distortion instead of harsh digital 0dB clipping. Disabled by default.

'mutel'

Mute the left channel. Disabled by default.

'muter'

Mute the right channel. Disabled by default.

'phasel'

Change the phase of the left channel. Disabled by default.

'phaser'

Change the phase of the right channel. Disabled by default.

'mode'

Set stereo mode. Available values are:

'lr>lr'

Left/Right to Left/Right, this is default.

'lr>ms'

Left/Right to Mid/Side.

'ms>lr'

Mid/Side to Left/Right.

'lr>ll'

Left/Right to Left/Left.

'lr>rr'

Left/Right to Right/Right.

'lr>l+r'

Left/Right to Left + Right.

'lr>rl'

Left/Right to Right/Left.

'ms>ll'

Mid/Side to Left/Left.

'ms>rr'

Mid/Side to Right/Right.

'slev'

Set level of side signal. Default is 1. Allowed range is from 0.015625 to 64.

'sbal'

Set balance of side signal. Default is 0. Allowed range is from -1 to 1.

'mlev'

Set level of the middle signal. Default is 1. Allowed range is from 0.015625 to 64.

'mpan'

Set middle signal pan. Default is 0. Allowed range is from -1 to 1.

'base'

Set stereo base between mono and inversed channels. Default is 0. Allowed range is from -1 to 1.

'delay'

Set delay in milliseconds how much to delay left from right channel and vice versa. Default is 0. Allowed range is from -20 to 20.

'sclevel'

Set S/C level. Default is 1. Allowed range is from 1 to 100.

'phase'

Set the stereo phase in degrees. Default is 0. Allowed range is from 0 to 360.

'bmode_in, bmode_out'

Set balance mode for balance_in/balance_out option.

Can be one of the following:

'balance'

Classic balance mode. Attenuate one channel at time. Gain is raised up to 1.

'amplitude'

Similar as classic mode above but gain is raised up to 2.

'power'

Equal power distribution, from -6dB to +6dB range.