import * as audiosprite from 'audiosprite'; const files = ['file1.mp3', 'file2.mp3']; const opts = {output: 'result'}; audiosprite(files, opts, (err, obj) => { if (err) { return err; } return JSON.stringify(obj, null, 2); }); audiosprite(files, { path: "aaa", format: "howler", export: "ogg,mp3", minlength: 9999, vbr: 9, 'vbr:vorbis': 10, logger: { debug(a) { } } }, (err, obj) => { });