Multiband Ring Modulated Sidechain Mono

Detailed: LSP Multiband Ring Modulated Sidechain Mono (MBRMSC1M)

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

Categories: Dynamics

Developer: Vladimir Sadovnikov

Description: 

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

The simplified process can be described by following steps:

• Split input and sidechain signal into multiple bands.
• Process each band independently:
• Rectify the sidechain signal. All negative audio samples on sidechain input change their sign and become positive.
• Limit the sidechain signal. All audio samples of the sidechain signal that come from previous step are limited by the 0 dBFS threshold.
• Modulate the original signal. The original signal is multiplied by rectified and limited sidechain signal.
• Subtract from the original signal. The modulated result is subtracted from the original signal.
• Mix processed bands together.

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.
• Mode - the crossover mode.
• Classic - classic operating mode using IIR filters and allpass filters to compensate phase shifts.
• Linear Phase - linear phase operating mode using FFT transform (FIR filters) to split signal into multiple bands, introduces additional latency.
• Slope - the slope of crossover filters.
• 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.
• Zoom - zoom fader, allows to adjust zoom on the frequency chart.

Band-processing controls:

• Band number button - enables additional split filter in the crossover and associated band with it.
• Range - allows to set the frequency range for the band.
• On - enables the signal processing for the selected band.
• Solo - turns selected band into solo mode.
• Mute - mutes the selected band.
• 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.
• 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.

'Analysis' section:

• FFT In - enables FFT curve graph of input signal on the spectrum graph.
• FFT SC - enables FFT curve graph of sidechain signal on the spectrum graph.
• FFT Out - enables FFT curve graph of output signal on the spectrum graph.
• Reactivity - the reactivity (smoothness) of the spectral analysis.
• Shift - allows to adjust the overall gain of the analysis.

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.