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Chroma

proof_engine::dsp::fft

Struct Chroma

pub struct Chroma;

Expand description

Chroma feature — pitch class profile (12 semitone bins).

Implementations§

impl Chroma

pub fn compute(spectrum: &Spectrum, sample_rate: f32) -> [f32; 12]

Compute the 12-bin chroma vector from a Spectrum.

pub fn cosine_distance(a: &[f32; 12], b: &[f32; 12]) -> f32

Distance between two chroma vectors (cosine distance, 0=identical, 1=orthogonal).

pub fn rotate(chroma: &[f32; 12], semitones: i32) -> [f32; 12]

Rotate chroma vector by semitones (for transposition-invariant comparison).

pub fn estimate_key(chroma: &[f32; 12]) -> (usize, bool)

Find the key (0=C, 1=C#, …, 11=B) that best matches the chroma. Uses the Krumhansl-Schmuckler key profiles.

Auto Trait Implementations§

impl Freeze for Chroma

impl RefUnwindSafe for Chroma

impl Send for Chroma

impl Sync for Chroma

impl Unpin for Chroma

impl UnsafeUnpin for Chroma

impl UnwindSafe for Chroma

Blanket Implementations§

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impl<S> FromSample<S> for S

fn from_sample_(s: S) -> S

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