daisysp::HarmonicOscillator< num_harmonics > Class Template Reference

Harmonic Oscillator Module based on Chebyshev polynomials. More...

#include <harmonic_osc.h>

Public Member Functions
void	Init (float sample_rate)
float	Process ()
void	SetFreq (float freq)
void	SetFirstHarmIdx (int idx)
void	SetAmplitudes (const float *amplitudes)
void	SetSingleAmp (const float amp, int idx)

Detailed Description

template<int num_harmonics = 16>
class daisysp::HarmonicOscillator< num_harmonics >

Harmonic Oscillator Module based on Chebyshev polynomials.

Author

Ben Sergentanis

Date

Dec 2020 Harmonic Oscillator Module based on Chebyshev polynomials
Works well for a small number of harmonics. For the higher order harmonics.
We need to reinitialize the recurrence by computing two high harmonics.

Ported from pichenettes/eurorack/plaits/dsp/oscillator/harmonic_oscillator.h
to an independent module.
Original code written by Emilie Gillet in 2016.

Member Function Documentation

Init()

template<int num_harmonics = 16>

void daisysp::HarmonicOscillator< num_harmonics >::Init ( float sample_rate )

inline

Initialize harmonic oscillator

Parameters

sample_rate

Audio engine samplerate

Process()

template<int num_harmonics = 16>

float daisysp::HarmonicOscillator< num_harmonics >::Process ( )

inline

Get the next floating point sample

SetAmplitudes()

template<int num_harmonics = 16>

void daisysp::HarmonicOscillator< num_harmonics >::SetAmplitudes ( const float * amplitudes )

inline

Set the amplitudes of each harmonic of the root.

Parameters

amplitudes

Amplitudes to set. Sum of all amplitudes must be < 1. The array referenced must be at least as large as num_harmonics.

SetFirstHarmIdx()

template<int num_harmonics = 16>

void daisysp::HarmonicOscillator< num_harmonics >::SetFirstHarmIdx ( int idx )

inline

Offset the set of harmonics. Passing in 3 means "harmonic 0" is the 3rd harm., 1 is the 4th, etc.

Parameters

idx	Default behavior is 1. Values < 0 default to 1.

SetFreq()

template<int num_harmonics = 16>

void daisysp::HarmonicOscillator< num_harmonics >::SetFreq ( float freq )

inline

Set the main frequency

Parameters

freq	Freq to be set in Hz.

SetSingleAmp()

template<int num_harmonics = 16>

void daisysp::HarmonicOscillator< num_harmonics >::SetSingleAmp ( const float amp, int idx )

inline

Sets one amplitude. Does nothing if idx out of range.

Parameters

amp	Amplitude to set
idx	Which harmonic to set.

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The documentation for this class was generated from the following file:

• Source/Synthesis/harmonic_osc.h