underscore.music
Music manipulation extensions for Underscore.js javascript library.
Node.js Installation
$ npm install underscore.music
Integrate with Underscore.js
var _ = require("underscore");
// Import underscore.music to separate object
_.music = require("underscore.music");
// Mix in non-conflict functions to underscore namespace
_.mixin(_.music.exports());Browser Installation
Bower
$ bower install underscore.music
Downloads
Integrate with Underscore.js
<script src="/path/to/underscore.js"></script>
<script src="/path/to/underscore.music.js"></script>
<script>
// Mix in non-conflict functions to underscore namespace
_.mixin(_.music.exports());
</script>Music Functions
midicps _.midicps(midi: number): number
Convert MIDI note to cycles per second
_.midicps(69) // 440
_.midicps(76) // 659.2551138257398
_.midicps(81) // 880mtof alias for midicps
cpsmidi _.cpsmidi(cps: number): number
Convert cycles per second to MIDI note
_.cpsmidi(440) // 69
_.cpsmidi(660) // 76.01955000865388
_.cpsmidi(880) // 81ftom alias for cpsmidi
midiratio _.ratiomidi(midi: number): number
Convert an interval in semitones to a ratio
_.midiratio(0) // 1
_.midiratio(7) // 1.4983070768766815
_.midiratio(12) // 2ratiomidi _.ratiomidi(ratio: number): number
Convert a ratio to an interval in semitone
_.ratiomidi(1) // 0
_.ratiomidi(2) // 12
_.ratiomidi(3) // 19.019550008653876dbamp _.dbamp(db: number): number
Convert a decibels to a linear amplitude
_.dbamp(0) // 1
_.dbamp(3) // 1.4125375446227544
_.dbamp(6) // 1.9952623149688797ampdb _.ampdb(amp: number): number
Convert a linear amplitude to decibels
_.ampdb(1) // 0
_.ampdb(3) // 6.020599913279624
_.ampdb(6) // 9.54242509439325linlin _.linlin(value: number, inMin, inMax, outMin, outMax): number
Convert linear input range to a linear output range
_.linlin(0.00, 0, 1, 0, 1000) // 0
_.linlin(0.25, 0, 1, 0, 1000) // 250
_.linlin(0.50, 0, 1, 0, 1000) // 500
_.linlin(0.75, 0, 1, 0, 1000) // 750
_.linlin(1.00, 0, 1, 0, 1000) // 1000linexp _.linexp(value: number, inMin, inMax, outMin, outMax): number
Convert linear input range to a exponential output range
_.linexp(0.00, 0, 1, 0.1, 1000) // 0.1
_.linexp(0.25, 0, 1, 0.1, 1000) // 1
_.linexp(0.50, 0, 1, 0.1, 1000) // 10
_.linexp(0.75, 0, 1, 0.1, 1000) // 100
_.linexp(1.00, 0, 1, 0.1, 1000) // 1000explin _.explin(value: number, inMin, inMax, outMin, outMax): number
Convert exponential input range to a linear output range
_.explin(0.10, 0.1, 1, 0, 1000) // 0
_.explin(0.25, 0.1, 1, 0, 1000) // 397.9400086720376
_.explin(0.50, 0.1, 1, 0, 1000) // 698.9700043360187
_.explin(0.75, 0.1, 1, 0, 1000) // 875.0612633916999
_.explin(1.00, 0.1, 1, 0, 1000) // 1000expexp _.expexp(value: number, inMin, inMax, outMin, outMax): number
Convert exponential input range to a exponential output range
_.expexp(0.10, 0.1, 1, 0.1, 1000) // 0
_.expexp(0.25, 0.1, 1, 0.1, 1000) // 3.90625
_.expexp(0.50, 0.1, 1, 0.1, 1000) // 62.49999999999997
_.expexp(0.75, 0.1, 1, 0.1, 1000) // 316.40624999999955
_.expexp(1.00, 0.1, 1, 0.1, 1000) // 1000License
underscore.music is available under the The MIT License.