Linux Studio Plugins Project

# Sidechain Expander Stereo

Detailed: LSP Sidechain Expander Stereo (SCE1S)

Formats: CLAP, JACK, LADSPA, LV2, VST2

Categories: Expander

Developer: Vladimir Sadovnikov

Description:

This plugin performs increasing of dynamic range of stereo input signal. Flexible sidechain-control configuration and additional sidechain inputs are provided. Both downward and upward modes are available. Also additional dry/wet control allows to mix processed and unprocessed signal together.

Additionally, Stereo split mode allows to apply processing to the left and right channels independently while keeping the same settings for the left and right channels.

Controls:

- Bypass - bypass switch, when turned on (led indicator is shining), the plugin bypasses signal.
- Pause - pauses any updates of the expander graph.
- Clear - clears all graphs.
- Stereo Split - enables independent compression of left and right channels.
- Gain L, R - enables drawing of gain amplification line and corresponding amplification meter.
- SC L, R - enables drawing of sidechain input graph and corresponding level meter.
- Env L, R - enables drawing of expander's envelope graph and corresponding level meter.
- In L, R - enables drawing of expander's input signal graph and corresponding level meter.
- Out L, R - enables drawing of expander's output signal graph and corresponding level meter.

'Sidechain' section:

- Preamp - pre-amplification of the sidechain signal.
- Reactivity - reactivity of the sidechain signal.
- Lookahead - look-ahead time of the sidechain relative to the input signal.
- Setup - Sidechain configuration, available values:

- Internal - sidechain input is connected to expander's input.
- External - sidechain signal is taken from additional (external) sidechain inputs of plugin.
- Peak - peak mode.
- RMS - Root Mean Square (SMA) of the input signal.
- LPF - input signal processed by recursive 1-pole Low-Pass Filter (LPF).
- SMA - input signal processed by Simple Moving Average (SMA) filter.
- Middle - middle part of signal is used for sidechain processing.
- Side - side part of signal is used for sidechain processing.
- Left - only left channel is used for sidechain processing.
- Right - only right channel is used for sidechain processing.
- Min - the absolute minimum value is taken from stereo input.
- Max - the absolute maximum value is taken from stereo input.
- Left/Right - left and right channels are being processed using respectively the left and right sidechain channels in stereo split mode.
- Right/Left - left and right channels are being processed using respectively the right and left sidechain channels in stereo split mode.
- Mid/Side - left and right channels are being processed using respectively the middle and side parts of sidechain signal in stereo split mode.
- Side/Mid - left and right channels are being processed using respectively the side and middle parts of sidechain signal in stereo split mode.

- Listen - allows to listen the processed sidechain signal.
- LPF - allows to set up slope and cut-off frequency for the low-pass filter applied to sidechain signal.
- HPF - allows to set up slope and cut-off frequency for the high-pass filter applied to sidechain signal.

'Expander' section:

- Mode - expander mode: Up (upward) or Down (downward).
- Ratio - expander ratio.
- Knee - size of the knee.
- Makeup - additional amplification gain after processing stage.
- Attack Level - threshold of the expander, placed in the middle of the knee.
- Attack Time - attack time of the expander.
- Release Level - relative to the Attack Level threshold that sets up the threshold of Release Time.
- Release Time - release time of the expander.
- Mix Dry - the amount of dry (unprocessed) signal.
- Mix Wet - the amount of wet (processed) signal.

'Signal' section:

- Input - overall input gain.
- Output - overall output gain.