Dynamics
Dynamics processors shape a signal’s level over time: compressing peaks, limiting brick-wall ceilings, gating noise, and ducking one signal under another.
The EnvelopeFollower (an amplitude detector) is documented under
Envelopes & Modulators.
Compressor
Feed-forward compressor with dB-domain gain computation, makeup gain, and an internally
normalled external sidechain. type_id: compressor.
let comp = patch.add("comp", Compressor::new(44100.0));Inputs
| Port | Signal | Range | Description |
|---|---|---|---|
in | Audio | ±5V | Audio input |
threshold | Unipolar CV | 0-10V | Threshold (×5 V), default 0.5 |
ratio | Unipolar CV | 0-10V | Ratio (1:1 – 20:1), default 0.5 |
attack | Unipolar CV | 0-10V | Attack time, default 0.2 |
release | Unipolar CV | 0-10V | Release time, default 0.3 |
makeup | Unipolar CV | 0-10V | Makeup gain (1×–4×), default 0.0 |
sidechain | Audio | ±5V | External key; normalled to in when unpatched |
Outputs
| Port | Signal | Description |
|---|---|---|
out | Audio | Compressed output |
gr | Unipolar CV | Gain-reduction CV |
Limiter
True brick-wall limiter with soft (renormalized tanh) or hard knee, plus an internally
normalled sidechain key. type_id: limiter.
let lim = patch.add("lim", Limiter::new(44100.0));Inputs
| Port | Signal | Range | Description |
|---|---|---|---|
in | Audio | ±5V | Audio input |
threshold | Unipolar CV | 0-10V | Ceiling (×5 V), default 0.8 |
release | Unipolar CV | 0-10V | Release time, default 0.3 |
soft | Gate | 0/5V | Soft (tanh) knee vs hard limiting; default on |
sidechain | Audio | ±5V | External key; normalled to in when unpatched |
Outputs
| Port | Signal | Description |
|---|---|---|
out | Audio | Limited output (hard-clamped to ±threshold) |
gr | Unipolar CV | Gain reduction |
The output is always hard-clamped to ±threshold, so peaks never exceed the ceiling
regardless of knee shape.
Noise Gate
Downward noise gate with hysteresis, a hold time, and an anti-click fade, plus an
internally normalled sidechain key. type_id: noise_gate.
let gate = patch.add("gate", NoiseGate::new(44100.0));Inputs
| Port | Signal | Range | Description |
|---|---|---|---|
in | Audio | ±5V | Audio input |
threshold | Unipolar CV | 0-10V | Open threshold (×5 V; close = 0.7×), default 0.1 |
attack | Unipolar CV | 0-10V | Detector attack, default 0.1 |
release | Unipolar CV | 0-10V | Detector release, default 0.3 |
range | Unipolar CV | 0-10V | Maximum attenuation depth, default 1.0 |
sidechain | Audio | ±5V | External key; normalled to in when unpatched |
Outputs
| Port | Signal | Description |
|---|---|---|
out | Audio | Gated output |
gate | Gate | Gate state (high when open) |
Ducker
Dedicated sidechain ducking: the key input attenuates the main signal by up to
amount. Knob values combine with CV through ModulatedParam. type_id: ducker.
let duck = patch.add("duck", Ducker::new(44100.0));
patch.connect(kick.out("out"), duck.in_("key"))?; // kick ducks the pad
patch.connect(pad.out("out"), duck.in_("in"))?;Inputs
| Port | Signal | Range | Description |
|---|---|---|---|
in | Audio | ±5V | Main signal |
key | Audio | ±5V | Sidechain key that drives the ducking |
amount | Bipolar CV | ±5V | Duck depth CV (summed with the knob) |
threshold | Bipolar CV | ±5V | Threshold CV (summed with the knob) |
attack | Unipolar CV | 0-10V | Envelope attack, default 0.1 |
release | Unipolar CV | 0-10V | Envelope release, default 0.3 |
Outputs
| Port | Signal | Description |
|---|---|---|
out | Audio | Ducked output |
gr | Unipolar CV | Gain reduction |
Unlike the compressor/limiter/gate sidechains (which are normalled to the main input),
the Ducker’s key is a dedicated, always-separate input. Knob values are also settable
in code with set_amount, amount, set_threshold, threshold.