Struct PitchShifter 

pub struct PitchShifter { /* private fields */ }

Granular pitch shifter

Real-time pitch shifting using two overlapping grains with crossfade. Uses a circular delay buffer with variable playback rate.

Latency and aliasing (Q033)

The wet path is delayed: each grain reads from behind the write pointer by at least half the window, and further behind for pitch-up (by (rate-1)·window) so a grain’s read pointer can never overtake the write pointer within its lifetime. To keep that margin inside the ring buffer, the effective window is automatically shortened at high pitch-up ratios. No oversampling is performed, so the resampled grains alias; the effect is intended as a character/lo-fi shifter, not a transparent one. Pitch is bounded to ±24 semitones (playback rate 0.25×–4×).

Ports

• Input 0: Audio input
• Input 1: Pitch shift in semitones (-24 to +24, bipolar CV maps to range)
• Input 2: Window size (0-1 CV maps to 10-100ms)
• Input 3: Wet/dry mix (0-1)
• Output 10: Audio output

Implementations

impl PitchShifter

pub fn new(sample_rate: f64) -> Self

Trait Implementations

impl Default for PitchShifter

fn default() -> Self

Returns the “default value” for a type.

impl GraphModule for PitchShifter

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, sample_rate: 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 PitchShifter

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