PDResonant Class Reference

PDResonant is a simple midi instrument using Phase distortion used to simulate resonant filter, based on https://en.wikipedia.org/wiki/Phase_distortion_synthesis. More...

#include <PDResonant.h>

Public Member Functions
	PDResonant ()
	Constructor.
void	noteOn (byte channel, byte pitch, byte velocity)
	Play a note in response to midi input. More...
void	noteOff (byte channel, byte pitch, byte velocity)
	Stop a note in response to midi input. More...
void	setPDEnv (int attack, int decay)
	Set the resonant filter sweep parameters. More...
void	update ()
	Update the filter sweep. More...
int	next ()
	Produce the audio output. More...

Detailed Description

PDResonant is a simple midi instrument using Phase distortion used to simulate resonant filter, based on https://en.wikipedia.org/wiki/Phase_distortion_synthesis.

The class shows how the Mozzi Phasor class can be used to generate an index into a wavetable, and an ADSR is used to modulate the effect by modifying the Phasor frequency and sync. More complex phase distortion effects could be developed by using precalculated tables, or calcuating tables on the fly using a double buffer, or a line-breakpoint model, a sort of hybridPhasor-Line object.

Definition at line 33 of file PDResonant.h.

Member Function Documentation

next()

int PDResonant::next ( )

inline

Produce the audio output.

This goes in updateAudio().

Definition at line 104 of file PDResonant.h.

noteOff()

void PDResonant::noteOff ( byte  channel, byte  pitch, byte  velocity  )

inline

Stop a note in response to midi input.

Params copied from MIDI library HandleNoteOff()

Parameters

channel	is the midi channel
pitch	is the midi note
velocity	you know what it is

Definition at line 69 of file PDResonant.h.

noteOn()

void PDResonant::noteOn ( byte  channel, byte  pitch, byte  velocity  )

inline

Play a note in response to midi input.

Params copied from MIDI library HandleNoteOn().

Parameters

channel	is the midi channel
pitch	is the midi note
velocity	you know what it is

Definition at line 54 of file PDResonant.h.

setPDEnv()

void PDResonant::setPDEnv ( int  attack, int  decay  )

inline

Set the resonant filter sweep parameters.

Parameters

attack	ADSR attack
decay	ADSR decay

Definition at line 80 of file PDResonant.h.

update()

void PDResonant::update ( )

inline

Update the filter sweep.

Use this in updateControl().

Definition at line 93 of file PDResonant.h.