A gulp wrapper for the mighty wavesurfer-peakbuilder package. It will generate JSON peak files for each audio file processed.
yarn add gulp-wavesurfer-peakbuilder --dev
'use strict';
import gulp from 'gulp';
import peakbuilder from 'gulp-wavesurfer-peakbuilder'
gulp.task('peaks', () => {
gulp.src(['../**/*.mp3'])
.pipe(peakbuilder())
.pipe(gulp.dest("./peaks"))
});
audioFile.mp3 will produce audioFile.json with peak array data. Example JSON output:
[0.0104,0.0794,0.1061,0.1082,0.1768,0.2746,0.2694,0.1862,0.3599,0.1484,0.4223,0.4424,0.2493,0.4375,0.4178,0.3509,0.3391,0.2226,0.0423,0.087,0.2732,0.3682,0.4185,0.2566,0.2742,0.4708,0.4507,0.423,0.4112,0.3949,0.5585,0.4705,0.3724,0.3204,0.3925,0.1907,0.0659,0.0895,0.431,0.4171,0.4161,0.3443,0.2777,0.3668,0.3724,0.4483,0.3946,0.3412,0.2441,0.2174,0.3245,0.3419,0.2711,0.2378,0.2046,0.3828,0.3464,0.3398,0.3713,0.4396,0.4365,0.2583,0.371,0.3835,0.5045,0.3894,0.1695,0.1772,0.1061,0.1207,0.0704,0.0752,0.1456,0.0534,0.1643,0.4604,0.3727,0.3325,0.3415,0.4618,0.3973,0.3183,0.3377,0.3627,0.2912,0.3242,0.5901,0.6341,0.4684,0.4258,0.4615,0.4583,0.39,0.3044,0.3176,0.4639,0.3107,0.1896,0.1349,0.1044,0.0801,0.0749,0.1158,0.4427,0.2905,0.2656,0.4684,0.5655,0.2836,0.2905,0.5533,0.4698,0.3575,0.1695,0.1914,0.4427,0.39,0.1664,0.0784,0.1914,0.449,0.4067,0.4296,0.2545,0.1349,0.3828,0.3824,0.2094,0.2032,0.1494,0.1144,0.1016,0.1259,0.0877,0.07,0.1668,0.5585,0.5121,0.4018,0.2805,0.3956,0.4514,0.432,0.2756,0.0676,0.3443,0.3796,0.2132,0.1044,0.0239,0.1858,0.1404,0.5429,0.4226,0.3235,0.3817,0.4247,0.4896,0.4965,0.4414,0.5135,0.587,0.5235,0.2798,0.1865,0.1519,0.3526,0.3658,0.2122,0.2139,0.0426,0.0142,0.0437,0.0756,0.0302,0.0929,0.3169,0.5149,0.4102,0.3696,0.3505,0.3131,0.2462,0.2257,0.5384,0.3991,0.44,0.4764,0.3928,0.2853,0.1997,0.1297,0.0908,0.1987,0.146,0.0953,0.1432,0.3238,0.5294,0.4483,0.4927,0.4792,0.4847,0.4792,0.3093,0.2392,0.1942,0.4164,0.4157,0.3297,0.2819,0.2073,0.1796,0.1841,0.2039,0.1383,0.1061,0.2344,0.4178,0.4629,0.4875,0.4213,0.4479,0.4421,0.3554,0.2396,0.1751,0.2531,0.4601,0.3186,0.2427,0.0981,0.0392,0.1369,0.0898,0.0371,0.0139,0.2347,0.4733,0.5478,0.5228,0.4854,0.4792,0.3887,0.3207,0.3346,0.2846,0.2198,0.389,0.2954,0.1976,0.1148,0.0579,0.0316,0.0628,0.0815,0.0343,0.2129,0.3848,0.3699,0.3193,0.2971,0.2521,0.2475,0.3103,0.3887,0.3037,0.2222,0.2389,0.2229,0.1834,0.1536,0.1082,0.0673,0.0371,0.0156,0.0128,0.1578,0.2829,0.3276,0.2916,0.241,0.1869,0.1383,0.2313,0.1373,0.0967,0.1553,0.1311,0.122,0.1026,0.0947,0.0763,0.0603,0.0482,0.0302,0.0191,0.0142,0.0073,0,0,0,0,0,0,0,0,0]