Ring Modulated Sidechain Mono

Detailed: LSP Ring Modulated Sidechain Mono (RMSC1M)

Formats: CLAP, JACK, LADSPA, LV2, VST2, VST3

Categories: Dynamics

Developer: Vladimir Sadovnikov

Description:

This plugins performs ring-modulated sidechaing of the audio signal.

The simplified process can be described by following steps:

Rectifying the sidechain signal. All negative audio samples on sidechain input change their sign and become positive.
Limiting the sidechain signal. All audio samples of the sidechain signal that come from previous step are limited by the 0 dBFS threshold.
Modulating the original signal. The original signal is multiplied by rectified and limited sidechain signal.
Subtracting from the original signal. The modulated result is subtracted from the original signal.

Such algorithm allows to mix two signals with 0 dBFS peak values without going out of 0 dBFS range.

As a side effect, because sidechain signal can change rapidly, the original signal can become distorted. To minimize distortion effect, additional smoothing, prediction and reactivity controls were added.

Controls:

Bypass - bypass switch, when turned on (led indicator is shining), the output signal is similar to input signal. That does not mean that the plugin is not working.
Pause - pauses any updates of the time graph.
Clear - clears all graphs.
Active - enables side-chaining effect. May be useful for A/B testing the signal with sidechain effect and without it.
Invert - enables inverse function: in this mode the plugin works like a ring modulator instead of rin-modulated sidechain.
Type - The sidechain source type:

Internal - the input signal is taken as a sidechain after pre-mixing stage.
External - the sidechain input signal is taken as a sidechain after pre-mixing stage.
Link - the shared memory link is used as a sidechain input signal after pre-mixing-stage.

Pre-mix - shows pre-mix control overlay.
Mix - shows the Dry/Wet control overlay.
Link - the name of the shared memory link to pass sidechain signal.
SC - enables drawing of sidechain input graph and corresponding level meter.
Gain - enables drawing of gain amplification line and corresponding amplification meter.
In - enables drawing of input signal graph and corresponding level meter.
Out - enables drawing of output signal graph and corresponding level meter.

Processor section:

Lookahead - allows to add some small delay to the signal and force sidechain to reduce the input signal earlier than actual peak happens.
Ducking - allows to add some small post-delay to the sidechain signal to force slower shutdown of the sidechain signal.
Hold - the time period the sidechain envelope holds it's maximum value before starting the release.
Release - the release time of the sidechain.
Amount - the additional pre-amplification of the sidechain signal before the limiting stage.

Signal section:

Input button - allows to pass the processed input signal tho the output of plugin.
Input knob - the loudness of the processed input signal.
Sidechain button - allows to pass the unprocessed sidechain signal tho the output of plugin.
Sidechain knob - the loudness of the unprocessed sidechain signal.
Output - the overall loudness of output signal.

Pre-mix control overlay:

In -> SC - the amount of signal from input channel added to the Sidechain.
In -> Link - the amount of signal from input channel added to the shared memory link.
SC -> In - the amount of signal from sidechain input channel added to the input channel.
SC -> Link - the amount of signal from sidechain input channel added to the shared memory link.
Link -> In - the amount of signal from shared memory link added to the input channel.
Link -> SC - the amount of signal from shared memory link added to the sidechain channel.

Dry/Wet mix control overlay:

Mix Dry - the amount of dry (unprocessed) signal.
Mix Wet - the amount of wet (processed) signal.
Mix Dry/Wet - the knob that controls this balance between mixed dry and wet signal (see Mix Dry and Mix Wet) and the dry (unprocessed) signal.