Rave Generation Sonic Dynamics

Sonic Dynamics is a stereo compressor and limiter plugin from Rave Generation, inspired by a classic analog dynamics processor.

It combines vintage tone with modern features through detailed analog modeling.

The plugin includes two emulation modes.

Modern (Rev D) uses a THAT2180 VCA for clean, accurate compression with low noise and fast response.

Vintage (Rev C) emulates a DBX2150-style VCA for a more colored, musical sound with added distortion, ripple-induced saturation, and slower, more pronounced envelope behavior.

Sonic Dynamics models soft-knee compression, separate peak and RMS detection, sidechain gating, and stereo linking.

It also adds modern conveniences like mix control and a high-pass sidechain filter.

This makes it suitable for vocals, drum bus, mix bus, and other sources where flexible, analog-style dynamics control is needed.

Compressor/Limiter

Feed-forward VCA compressor with controls for threshold, ratio, attack, release, knee, and make-up gain.

In Limit mode, it uses a high ratio and fixed attack/release for fast, transparent limiting.

Soft knee gives a smooth transition, while hard knee is abrupt; detection can be Peak or RMS.

Low-Frequency Relax (De-Rumbler)

The Lo Freq Relax HPF cleans up sub-bass before detection. It is a cascaded 24 dB/oct high-pass filter whose cutoff is controlled by the knob.

Use this to prevent deep bass hits (like kick or low-end rumble) from over-triggering compression.

For example, setting it to 80 Hz can avoid excessive pumping on bass-heavy tracks.

At 0 Hz this feature is disabled.

Sidechain Routing

The main inputs feed both the audio output and the internal sidechain detector.

If an external sidechain is available and Ext SC is enabled, the plug-in uses the auxiliary inputs as the detection source for both compressor and gate.

This allows ducking or keycontrolled effects.

The Lo Freq Relax HPF is always applied to whichever source is used for detection.

Stereo/Dual-Mono Processing

By default, Sonic Dynamics is a true stereo processor.

With Stereo Link on, one envelope (from the louder channel) drives both channels' VCAs.

With Link off, it operates in dual-mono: each channel’s compressor and gate respond independently.

Gate/Expander

After the compressor section, Sonic Dynamics applies a gate on each channel.

The gate threshold and decay are set by Gate Threshold and Gate Rate.

If the signal falls below the threshold, the gate closes: it remains open for a fixed “hold” time (the Gate Rate setting) then exponentially decays shut.

This models the hardware’s gate circuit (100 kΩ/1 µF network).

Use the gate to silence noise or bleed during quiet passages.

The gate detector also follows the selected sidechain source.

Auto and Mode-Dependent Control Behavior

Sonic Dynamics automatically disables or ignores certain controls when specific modes are active, mirroring the behavior of the analog hardware:

Limit Mode

When Limit mode is engaged, Attack, Release, and Ratio controls are disabled.

The compressor operates with a fixed, ultra-fast attack, a musical release, and an extremely high ratio (for true peak limiting).

Adjusting these knobs has no effect in Limit mode.

RMS Mode

When RMS detection is selected, Attack and Release controls are disabled.

In this mode, the envelope timing is set internally for slow, program-dependent behavior, and the knobs are bypassed.

LED Meters

The gain reduction (GR) and output meters remain active in all modes, giving you instant visual feedback on compression, gating, and output levels with no added latency.