svcore  1.9
Pitch Class Reference

#include <Pitch.h>

List of all members.

Static Public Member Functions

static float getFrequencyForPitch (int midiPitch, float centsOffset=0, float concertA=0.0)
 Return the frequency at the given MIDI pitch plus centsOffset cents (1/100ths of a semitone).
static int getPitchForFrequency (float frequency, float *centsOffsetReturn=0, float concertA=0.0)
 Return the nearest MIDI pitch to the given frequency.
static int getPitchForFrequencyDifference (float frequencyA, float frequencyB, float *centsOffsetReturn=0, float concertA=0.0)
 Return the nearest MIDI pitch range to the given frequency range, that is, the difference in MIDI pitch values between the higher and lower frequencies.
static QString getPitchLabel (int midiPitch, float centsOffset=0, bool useFlats=false)
 Return a string describing the given MIDI pitch, with optional cents offset.
static QString getPitchLabelForFrequency (float frequency, float concertA=0.0, bool useFlats=false)
 Return a string describing the nearest MIDI pitch to the given frequency, with cents offset.
static QString getLabelForPitchRange (int semis, float cents=0)
 Return a string describing the given pitch range in octaves, semitones and cents.
static bool isFrequencyInMidiRange (float frequency, float concertA=0.0)
 Return true if the given frequency falls within the range of MIDI note pitches, plus or minus half a semitone.

Detailed Description

Definition at line 21 of file Pitch.h.


Member Function Documentation

float Pitch::getFrequencyForPitch ( int  midiPitch,
float  centsOffset = 0,
float  concertA = 0.0 
) [static]

Return the frequency at the given MIDI pitch plus centsOffset cents (1/100ths of a semitone).

centsOffset does not have to be in any particular range or sign.

If concertA is non-zero, use that as the reference frequency for the A at MIDI pitch 69; otherwise use the tuning frequency specified in the application preferences (default 440Hz).

Definition at line 23 of file Pitch.cpp.

References Preferences::getInstance(), and Preferences::getTuningFrequency().

Referenced by NoteData::getFrequency(), and FFTModel::getPeakPickWindowSize().

int Pitch::getPitchForFrequency ( float  frequency,
float *  centsOffsetReturn = 0,
float  concertA = 0.0 
) [static]

Return the nearest MIDI pitch to the given frequency.

If centsOffsetReturn is non-NULL, return in *centsOffsetReturn the number of cents (1/100ths of a semitone) difference between the given frequency and that of the returned MIDI pitch. The cents offset will be in the range [-50,50).

If concertA is non-zero, use that as the reference frequency for the A at MIDI pitch 69; otherwise use the tuning frequency specified in the application preferences (default 440Hz).

Definition at line 35 of file Pitch.cpp.

References Preferences::getInstance(), and Preferences::getTuningFrequency().

Referenced by NoteModel::getNotesWithin(), FlexiNoteModel::getNotesWithin(), getPitchLabelForFrequency(), and isFrequencyInMidiRange().

int Pitch::getPitchForFrequencyDifference ( float  frequencyA,
float  frequencyB,
float *  centsOffsetReturn = 0,
float  concertA = 0.0 
) [static]

Return the nearest MIDI pitch range to the given frequency range, that is, the difference in MIDI pitch values between the higher and lower frequencies.

If centsOffsetReturn is non-NULL, return in *centsOffsetReturn the number of cents (1/100ths of a semitone) difference between the given frequency difference and the returned MIDI pitch range. The cents offset will be in the range [-50,50).

If concertA is non-zero, use that as the reference frequency for the A at MIDI pitch 69; otherwise use the tuning frequency specified in the application preferences (default 440Hz).

Definition at line 57 of file Pitch.cpp.

References Preferences::getInstance(), and Preferences::getTuningFrequency().

QString Pitch::getPitchLabel ( int  midiPitch,
float  centsOffset = 0,
bool  useFlats = false 
) [static]

Return a string describing the given MIDI pitch, with optional cents offset.

This consists of the note name, octave number, and optional cents. The octave numbering system is based on the application preferences (default is C4 = middle C, though in previous SV releases that was C3).

For example, "A#3" (A# in octave 3) or "C2-12c" (C in octave 2, minus 12 cents).

If useFlats is true, spell notes with flats instead of sharps, e.g. Bb3 instead of A#3.

Definition at line 100 of file Pitch.cpp.

References flatNotes, Preferences::getInstance(), Preferences::getOctaveOfLowestMIDINote(), and notes.

Referenced by getPitchLabelForFrequency(), and MIDIFileReader::loadTrack().

QString Pitch::getPitchLabelForFrequency ( float  frequency,
float  concertA = 0.0,
bool  useFlats = false 
) [static]

Return a string describing the nearest MIDI pitch to the given frequency, with cents offset.

If concertA is non-zero, use that as the reference frequency for the A at MIDI pitch 69; otherwise use the tuning frequency specified in the application preferences (default 440Hz).

If useFlats is true, spell notes with flats instead of sharps, e.g. Bb3 instead of A#3.

Definition at line 130 of file Pitch.cpp.

References Preferences::getInstance(), getPitchForFrequency(), getPitchLabel(), and Preferences::getTuningFrequency().

QString Pitch::getLabelForPitchRange ( int  semis,
float  cents = 0 
) [static]

Return a string describing the given pitch range in octaves, semitones and cents.

This is in the form e.g. "1'2+4c".

Definition at line 143 of file Pitch.cpp.

bool Pitch::isFrequencyInMidiRange ( float  frequency,
float  concertA = 0.0 
) [static]

Return true if the given frequency falls within the range of MIDI note pitches, plus or minus half a semitone.

This is equivalent to testing whether getPitchForFrequency returns a pitch in the MIDI range (0 to 127 inclusive) with any cents offset.

If concertA is non-zero, use that as the reference frequency for the A at MIDI pitch 69; otherwise use the tuning frequency specified in the application preferences (default 440Hz).

Definition at line 184 of file Pitch.cpp.

References getPitchForFrequency().


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