MPENote Struct Reference

This struct represents a playing MPE note. More...

#include <juce_MPENote.h>

Public Types
enum	KeyState { off = 0 , keyDown = 1 , sustained = 2 , keyDownAndSustained = 3 }
	Possible values for the note key state. More...

Public Member Functions
	MPENote (int midiChannel, int initialNote, MPEValue velocity, MPEValue pitchbend, MPEValue pressure, MPEValue timbre, KeyState keyState=MPENote::keyDown) noexcept
	Constructor.
	MPENote () noexcept
	Default constructor.
bool	isValid () const noexcept
	Checks whether the MPE note is valid.
double	getFrequencyInHertz (double frequencyOfA=440.0) const noexcept
	Returns the current frequency of the note in Hertz.
bool	operator== (const MPENote &other) const noexcept
	Returns true if two notes are the same, determined by their unique ID.
bool	operator!= (const MPENote &other) const noexcept
	Returns true if two notes are different notes, determined by their unique ID.

Public Attributes
uint16	noteID = 0
	A unique ID.
uint8	midiChannel = 0
	The MIDI channel which this note uses.
uint8	initialNote = 0
	The MIDI note number that was sent when the note was triggered.
MPEValue	noteOnVelocity { MPEValue::minValue() }
	The velocity ("strike") of the note-on.
MPEValue	pitchbend { MPEValue::centreValue() }
	Current per-note pitchbend of the note (in units of MIDI pitchwheel position).
MPEValue	pressure { MPEValue::centreValue() }
	Current pressure with which the note is held down.
MPEValue	initialTimbre { MPEValue::centreValue() }
	Initial value of timbre when the note was triggered.
MPEValue	timbre { MPEValue::centreValue() }
	Current value of the note's third expressive dimension, typically encoding some kind of timbre parameter.
MPEValue	noteOffVelocity { MPEValue::minValue() }
	The release velocity ("lift") of the note after a note-off has been received.
double	totalPitchbendInSemitones
	Current effective pitchbend of the note in units of semitones, relative to initialNote.
KeyState	keyState { MPENote::off }
	Current key state.

Detailed Description

This struct represents a playing MPE note.

A note is identified by a unique ID, or alternatively, by a MIDI channel and an initial note. It is characterised by five dimensions of continuous expressive control. Their current values are represented as MPEValue objects.

See also

MPEValue

Member Enumeration Documentation

KeyState

enum MPENote::KeyState

Possible values for the note key state.

Enumerator
off	The key is up (off).
keyDown	The note key is currently down (pressed).
sustained	The note is sustained (by a sustain or sostenuto pedal).
keyDownAndSustained	The note key is down and sustained (by a sustain or sostenuto pedal).

Constructor & Destructor Documentation

MPENote() [1/2]

MPENote::MPENote ( int midiChannel, int initialNote, MPEValue velocity, MPEValue pitchbend, MPEValue pressure, MPEValue timbre, KeyState keyState = MPENote::keyDown )

noexcept

Constructor.

Parameters

midiChannel	The MIDI channel of the note, between 2 and 15. (Channel 1 and channel 16 can never be note channels in MPE).
initialNote	The MIDI note number, between 0 and 127.
velocity	The note-on velocity of the note.
pitchbend	The initial per-note pitchbend of the note.
pressure	The initial pressure of the note.
timbre	The timbre value of the note.
keyState	The key state of the note (whether the key is down and/or the note is sustained). This value must not be MPENote::off, since you are triggering a new note. (If not specified, the default value will be MPENote::keyDown.)

MPENote() [2/2]

MPENote::MPENote ( )

noexcept

Default constructor.

Constructs an invalid MPE note (a note with the key state MPENote::off and an invalid MIDI channel. The only allowed use for such a note is to call isValid() on it; everything else is undefined behaviour.

Member Function Documentation

isValid()

bool MPENote::isValid ( ) const

noexcept

Checks whether the MPE note is valid.

getFrequencyInHertz()

double MPENote::getFrequencyInHertz ( double frequencyOfA = 440.0 ) const

noexcept

Returns the current frequency of the note in Hertz.

This is the sum of the initialNote and the totalPitchbendInSemitones, converted to Hertz.

operator==()

bool MPENote::operator== ( const MPENote & other ) const

noexcept

Returns true if two notes are the same, determined by their unique ID.

operator!=()

bool MPENote::operator!= ( const MPENote & other ) const

noexcept

Returns true if two notes are different notes, determined by their unique ID.

Member Data Documentation

noteID

uint16 MPENote::noteID = 0

A unique ID.

Useful to distinguish the note from other simultaneously sounding notes that may use the same note number or MIDI channel. This should never change during the lifetime of a note object.

midiChannel

uint8 MPENote::midiChannel = 0

The MIDI channel which this note uses.

This should never change during the lifetime of an MPENote object.

initialNote

uint8 MPENote::initialNote = 0

The MIDI note number that was sent when the note was triggered.

This should never change during the lifetime of an MPENote object.

noteOnVelocity

MPEValue MPENote::noteOnVelocity { MPEValue::minValue() }

The velocity ("strike") of the note-on.

This dimension will stay constant after the note has been turned on.

pitchbend

MPEValue MPENote::pitchbend { MPEValue::centreValue() }

Current per-note pitchbend of the note (in units of MIDI pitchwheel position).

This dimension can be modulated while the note sounds.

Note: This value is not aware of the currently used pitchbend range, or an additional master pitchbend that may be simultaneously applied. To compute the actual effective pitchbend of an MPENote, you should probably use the member totalPitchbendInSemitones instead.

See also

totalPitchbendInSemitones, getFrequencyInHertz

pressure

MPEValue MPENote::pressure { MPEValue::centreValue() }

Current pressure with which the note is held down.

This dimension can be modulated while the note sounds.

initialTimbre

MPEValue MPENote::initialTimbre { MPEValue::centreValue() }

Initial value of timbre when the note was triggered.

This should never change during the lifetime of an MPENote object.

timbre

MPEValue MPENote::timbre { MPEValue::centreValue() }

Current value of the note's third expressive dimension, typically encoding some kind of timbre parameter.

This dimension can be modulated while the note sounds.

noteOffVelocity

MPEValue MPENote::noteOffVelocity { MPEValue::minValue() }

The release velocity ("lift") of the note after a note-off has been received.

This dimension will only have a meaningful value after a note-off has been received for the note (and keyState is set to MPENote::off or MPENote::sustained). Initially, the value is undefined.

totalPitchbendInSemitones

double MPENote::totalPitchbendInSemitones

Current effective pitchbend of the note in units of semitones, relative to initialNote.

You should use this to compute the actual effective pitch of the note. This value is computed and set by an MPEInstrument to the sum of the per-note pitchbend value (stored in MPEValue::pitchbend) and the master pitchbend of the MPE zone, weighted with the per-note pitchbend range and master pitchbend range of the zone, respectively.

See also

getFrequencyInHertz

keyState

KeyState MPENote::keyState { MPENote::off }

Current key state.

Indicates whether the note key is currently down (pressed) and/or the note is sustained (by a sustain or sostenuto pedal).

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

• juce_MPENote.h