Convert duration values to ms

[tmhglnd]

trafficstars

An enhancement to the Translate library of a method that converts various duration values from different platforms to a corresponding millisecond value based on a set tempo.

example

const TL = require('total-serialism').Translate;

TL.setTempo(120);
//=> set tempo to 120 beats per minute

var rhythm = [8n, 4n, 16n];
TL.toTime(rhythm)
//=> [ 250, 500, 125 ]

But could also work with division notation

const TL = require('total-serialism').Translate;

TL.setTempo(120);
//=> set tempo to 120 beats per minute

var rhythm = ['1/8', '1/4', '1/16'];
TL.toTime(rhythm)
//=> [ 250, 500, 125 ]

Or with floating point ratio values

const TL = require('total-serialism').Translate;

TL.setTempo(120);
//=> set tempo to 120 beats per minute

var rhythm = [0.125, 0.25, 0.0625];
TL.toTime(rhythm)
//=> [ 250, 500, 125 ]

[tmhglnd]

Not yet possible with one function that works for all, but there are now several translate methods for different types of input. Using the Time Value Syntax of Cycling'74's MaxMSP

// format: TL.func(<Array>, <bpm>)

TL.divisionToMs(['1/4', ['1/8', ['3/16', '1/4']], '1/6', '2'], 100);
//=> [ 600, [ 300, [ 450, 600 ] ], 400, 4800 ] 
// Alias: TL.dtoms()

TL.ratioToMs([0.25, [0.125, [0.1875, 0.25]], 0.1667, 2], 100);
//=> [ 600, [ 300, [ 450, 600 ] ], 400.08, 4800 ] 
// Alias: TL.rtoms()

TL.timevalueToMs(['4n', ['8nt', ['16nd', '2nd']], '32n', '3m'], 100);
//=> [ 600, [ 200, [ 225, 1800 ] ], 75, 7200 ] 
// Alias. TL.ttoms()