Synthesiser Class Reference

Advanced MPE-capable synthesizer with mono/poly modes, glide, and voice management. More...

#include <gin_synthesiser.h>

Inherits juce::MPESynthesiser.

Public Member Functions
	Synthesiser ()
void	setMono (bool m)
void	setNumVoices (int v)
void	setLegato (bool l)
void	setGlissando (bool g)
void	setPortamento (bool p)
void	setGlideRate (float r)
void	turnOffAllVoices (bool allowTailOff) override
void	setMPE (bool newMPE)
void	handleMidiEvent (const juce::MidiMessage &message) override
void	setPitchBendRange (int newPB)
void	noteAdded (juce::MPENote newNote) override
void	noteReleased (juce::MPENote finishedNote) override
void	noteAddedMono (juce::MPENote newNote)
void	noteReleasedMonoGlide (juce::MPENote finishedNote)
void	noteReleasedMono (juce::MPENote finishedNote)
bool	isNotePlaying (juce::MPENote &n)
int	getNumActiveVoices ()
juce::Array< SynthesiserVoice * >	getActiveVoices ()
int	getCpuUsage ()
void	startBlock ()
void	endBlock (int blockSize)
void	retriggerVoice (SynthesiserVoice *v, juce::MPENote note)
virtual void	startVoice (juce::MPESynthesiserVoice *v, juce::MPENote note)
void	updateGlide (juce::MPESynthesiserVoice *v)
void	stopVoiceFastKill (juce::MPESynthesiserVoice *v, juce::MPENote note, bool tailOff)
juce::MPESynthesiserVoice *	findVoiceToSteal (juce::MPENote noteToStealVoiceFor=juce::MPENote()) const override
template<typename floatType>
void	renderNextBlock (juce::AudioBuffer< floatType > &outputAudio, const juce::MidiBuffer &inputMidi, int startSample, int numSamples)
SynthesiserVoice *	getOldestVoice ()
SynthesiserVoice *	getNewestVoice ()

Protected Attributes
int	noteOnIndex = -1
int	noteOffIndex = -1

Detailed Description

Advanced MPE-capable synthesizer with mono/poly modes, glide, and voice management.

Synthesiser extends JUCE's MPESynthesiser with professional features commonly needed in modern synthesizers:

Key Features:

• Monophonic and polyphonic modes
• Legato mode (retriggering without envelope restart)
• Portamento (smooth pitch glide) and glissando (stepped pitch glide)
• Configurable voice count with intelligent voice stealing
• Fast-kill voice stealing (immediate voice termination)
• MPE (MIDI Polyphonic Expression) support
• CPU usage monitoring
• Pitchbend range control

Mono Mode: In monophonic mode, only one voice plays at a time. New notes either retrigger the envelope (non-legato) or smoothly transition pitch without retriggering (legato). Released notes in the note stack will cause the synth to jump back to the most recent held note.

Voice Stealing: When voice limit is reached, the oldest voice is stolen. The fast-kill mechanism allows immediate voice termination rather than waiting for release envelope, preventing audio glitches.

Glide Modes:

• Portamento: Smooth exponential pitch glide between notes
• Glissando: Stepped pitch glide through semitones
• Rate: Glide time in milliseconds

Usage:

Synthesiser synth;
synth.addVoice(new MyVoice());
synth.setSampleRate(44100.0);
 
// Configure mono mode with portamento
synth.setMono(true);
synth.setLegato(true);
synth.setPortamento(true);
synth.setGlideRate(250.0f); // 250ms glide
 
// Or poly mode
synth.setMono(false);
synth.setNumVoices(8); // Max 8 simultaneous voices
 
// MPE mode
synth.setMPE(true);
synth.setPitchBendRange(48); // ±48 semitones
 
synth.renderNextBlock(audioBuffer, midiBuffer, 0, numSamples);

See also

SynthesiserVoice, GlideInfo, juce::MPESynthesiser

Constructor & Destructor Documentation

Synthesiser()

Synthesiser::Synthesiser

(

)

Member Function Documentation

setMono()

void Synthesiser::setMono

(

bool

m

)

setNumVoices()

void Synthesiser::setNumVoices

(

int

v

)

setLegato()

void Synthesiser::setLegato

(

bool

l

)

setGlissando()

void Synthesiser::setGlissando

(

bool

g

)

setPortamento()

void Synthesiser::setPortamento

(

bool

p

)

setGlideRate()

void Synthesiser::setGlideRate

(

float

r

)

turnOffAllVoices()

void Synthesiser::turnOffAllVoices ( bool allowTailOff )

override

Referenced by handleMidiEvent().

setMPE()

void Synthesiser::setMPE

(

bool

newMPE

)

handleMidiEvent()

void Synthesiser::handleMidiEvent ( const juce::MidiMessage & message )

override

References turnOffAllVoices().

setPitchBendRange()

void Synthesiser::setPitchBendRange

(

int

newPB

)

noteAdded()

void Synthesiser::noteAdded ( juce::MPENote newNote )

override

References findVoiceToSteal(), getNumActiveVoices(), noteAddedMono(), and startVoice().

noteReleased()

void Synthesiser::noteReleased ( juce::MPENote finishedNote )

override

References noteReleasedMono(), and noteReleasedMonoGlide().

noteAddedMono()

void Synthesiser::noteAddedMono

(

juce::MPENote

newNote

)

References retriggerVoice(), and startVoice().

Referenced by noteAdded().

noteReleasedMonoGlide()

void Synthesiser::noteReleasedMonoGlide

(

juce::MPENote

finishedNote

)

References retriggerVoice(), and startVoice().

Referenced by noteReleased().

noteReleasedMono()

void Synthesiser::noteReleasedMono

(

juce::MPENote

finishedNote

)

References retriggerVoice(), and startVoice().

Referenced by noteReleased().

isNotePlaying()

bool Synthesiser::isNotePlaying

(

juce::MPENote &

n

)

getNumActiveVoices()

int Synthesiser::getNumActiveVoices

(

)

Referenced by noteAdded().

getActiveVoices()

juce::Array< SynthesiserVoice * > Synthesiser::getActiveVoices

(

)

getCpuUsage()

int Synthesiser::getCpuUsage

(

)

startBlock()

void Synthesiser::startBlock

(

)

endBlock()

void Synthesiser::endBlock

(

int

blockSize

)

retriggerVoice()

void Synthesiser::retriggerVoice	(	SynthesiserVoice *	v,
		juce::MPENote	note )

References SynthesiserVoice::noteRetriggered(), SynthesiserVoice::setCurrentlyPlayingNote(), and updateGlide().

Referenced by noteAddedMono(), noteReleasedMono(), and noteReleasedMonoGlide().

startVoice()

virtual void Synthesiser::startVoice ( juce::MPESynthesiserVoice * v, juce::MPENote note )

virtual

References updateGlide().

Referenced by noteAdded(), noteAddedMono(), noteReleasedMono(), and noteReleasedMonoGlide().

updateGlide()

void Synthesiser::updateGlide

(

juce::MPESynthesiserVoice *

v

)

References GlideInfo::fromNote, GlideInfo::glissando, GlideInfo::portamento, and GlideInfo::rate.

Referenced by retriggerVoice(), and startVoice().

stopVoiceFastKill()

void Synthesiser::stopVoiceFastKill	(	juce::MPESynthesiserVoice *	v,
		juce::MPENote	note,
		bool	tailOff )

findVoiceToSteal()

juce::MPESynthesiserVoice * Synthesiser::findVoiceToSteal ( juce::MPENote noteToStealVoiceFor = juce::MPENote() ) const

override

Referenced by noteAdded().

renderNextBlock()

template<typename floatType>

void Synthesiser::renderNextBlock	(	juce::AudioBuffer< floatType > &	outputAudio,
		const juce::MidiBuffer &	inputMidi,
		int	startSample,
		int	numSamples )

References getNewestVoice(), noteOffIndex, and noteOnIndex.

getOldestVoice()

SynthesiserVoice * Synthesiser::getOldestVoice

(

)

getNewestVoice()

SynthesiserVoice * Synthesiser::getNewestVoice

(

)

Referenced by renderNextBlock().

Member Data Documentation

noteOnIndex

int Synthesiser::noteOnIndex = -1

protected

Referenced by renderNextBlock().

noteOffIndex

int Synthesiser::noteOffIndex = -1

protected

Referenced by renderNextBlock().

---

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

• gin_synthesiser.h