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ModulationSpectrum

sound_to_patch::dsp

Struct ModulationSpectrum 

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pub struct ModulationSpectrum { /* private fields */ }
Expand description

The magnitude spectrum of a detrended, Hann-windowed track, zero-padded 8x. Its resolution stays 1 / T; the padding samples it finer.

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impl ModulationSpectrum

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pub fn of(track: &Track) -> Self

Computes the spectrum of a track.

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pub fn magnitudes(&self) -> &[f64]

Returns the magnitudes, one per bin from 0 Hz.

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pub fn bin_width(&self) -> Hz

Returns the bin spacing.

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pub fn magnitude_at(&self, frequency: f64) -> f64

Returns the magnitude at a frequency, linearly interpolated between bins; 0 beyond the last bin.

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pub fn peak(&self, lo: Hz, hi: Hz) -> Option<Hz>

Returns the frequency of the largest bin between lo and hi, with no interpolation.

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pub fn fundamental(&self, lo: Hz, hi: Hz) -> Option<Hz>

Returns the modulation rate between lo and hi, or None when no line stands out, as in Self::rate.

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pub fn rate(&self, lo: Hz, hi: Hz) -> Result<Estimate<Hz, Hz>, ConfidenceError>

The modulation rate between lo and hi: the strongest strict maximum inside the range, refined by a least-squares sine fit. It must stand LINE_PROMINENCE times above the median amplitude and reach MIN_LINE_DEPTH. No estimate when no line stands out or the span holds fewer than two cycles of the rate. The spread is the resolution, 1 / T.

§Errors

Never in practice; the reasons are built from counts.

Trait Implementations§

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impl Clone for ModulationSpectrum

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ModulationSpectrum

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for ModulationSpectrum

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fn eq(&self, other: &Self) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for ModulationSpectrum

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
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impl<T> CloneAny for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Downcast for T
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Calls U::from(self).

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