Rites - Musical scales and tunings library

Installation

npm install rites

Example

var scale = new rites.scale.Major();
// The third degree of a major scale with root frequency at low C (65.406Hz),
// in the second octave i.e. bass E.
scale.getFrequency(2, 65.406, 1);

API Documentation

Scales

Scale

new rites.scale.Scale(degrees, [tuning=new rites.tuning.EqualTemperament(12)]);

Representation of a generic musical scale. Can be subclassed to produce specific scales.

Parameters:

• degrees - Number[] - Array of integer degrees
• tuning - Tuning - The scale's tuning. Defaults to 12-tone ET.

rites.scale.Scale.prototype.getFrequency(degree, rootFrequency, octave);

Get the frequency of a note in the scale.

Parameters:

• degree - Number - The note's degree.
• rootFrequency - Number - The root frequency of the scale.
• octave - Number - The octave of the note.

Returns:

Number - The frequency of the note in hz.

Major

new rites.scale.Major();

Major scale.

Extends:

rites.scale.Scale

Major

new rites.scale.Minor();

Representation of a generic musical tuning. Can be subclassed to produce specific tunings.

Tunings

Tuning

new rites.tuning.Tuning(semitones, [octaveRatio=2]);

Parameters:

• semitones - Number[] - Array of semitone values for the tuning.
• octaveRatio - Number - Frequency ratio for notes an octave apart.

EqualTemperamentTuning

new rites.tuning.EqualTemperament(pitchesPerOctave);

Extends:

rites.scale.Scale

Parameters:

• pitchesPerOctave - Number The number of notes in each octave.