Struct Vca 

pub struct Vca { /* private fields */ }

Voltage-Controlled Amplifier (VCA)

An amplifier with CV control, useful for amplitude modulation.

Control voltage

cv in [0, 10]V maps to a base control amount in [0, 1] (values outside the range are clamped). With the default cv of 10V the base amount is unity.

Response curve

The response input selects how the control amount maps to gain: 0V (default) is linear (gain = cv/10); a high level (> GATE_THRESHOLD_V, e.g. 5V) selects an exponential (square-law) taper gain = (cv/10)². The exponential curve is monotonic with matched endpoints (0→0, 1→1) and a documented midpoint of 0.25 at cv = 5V.

Boost

The gain input is a post-response scale in [0, 2] (default 1.0), allowing up to +6 dB of boost/overdrive headroom. With all inputs at their defaults the VCA is bit-for-bit identical to a plain out = in · cv/10.

Implementations

impl Vca

pub fn new() -> Self

Trait Implementations

impl Default for Vca

fn default() -> Self

Returns the “default value” for a type.

impl GraphModule for Vca

fn port_spec(&self) -> &PortSpec

Returns the module’s port specification

fn tick(&mut self, inputs: &PortValues, outputs: &mut PortValues)

Process one sample given port values

fn reset(&mut self)

Reset internal state

fn set_sample_rate(&mut self, _: f64)

Set sample rate

fn type_id(&self) -> &'static str

Get module type identifier for serialization

fn process_block( &mut self, inputs: &BlockPortValues, outputs: &mut BlockPortValues, frames: usize, )

Process a block of samples (optional optimization).

fn breaks_feedback_cycle(&self) -> bool

Whether this module breaks a feedback cycle in the patch graph.

fn params(&self) -> &[ParamDef]

Get parameter definitions for UI binding.

fn get_param(&self, _id: ParamId) -> Option<f64>

Get a parameter value.

fn set_param(&mut self, _id: ParamId, _value: f64)

Set a parameter value.

fn serialize_state(&self) -> Option<Value>

Available on crate feature alloc only.

Serialize module state (alloc feature only)

fn deserialize_state(&mut self, _state: &Value) -> Result<(), String>

Available on crate feature alloc only.

Deserialize module state (alloc feature only)

fn introspect(&self) -> Option<&dyn ModuleIntrospection>

Available on crate feature alloc only.

Downcast this module to its ModuleIntrospection view, if it exposes one.

fn introspect_mut(&mut self) -> Option<&mut dyn ModuleIntrospection>

Available on crate feature alloc only.

Mutable companion to introspect, used to set internal parameters.

impl ModuleIntrospection for Vca

Available on crate feature alloc only.

fn param_infos(&self) -> Vec<ParamInfo>

Get all parameter descriptors for this module

fn get_param_info(&self, id: &str) -> Option<ParamInfo>

Get a specific parameter by its ID

fn set_param_by_id(&mut self, _id: &str, _value: f64) -> bool

Set a parameter value by its ID