To try all this out, let's add three sample audio files from a jazz track composed by the exquisite Jesper Buhl Trio called What Is This Thing Called Love. The tracks are already separated by drums, bass, and piano. We can add these .mp3 files to an app/audio folder.
Let's modify our demo composition's tracks in MixerService to provide references to these new real audio files. Open app/modules/mixer/services/mixer.service.ts and make the following modifications:
private _demoComposition(): Array<IComposition> { // starter composition for user to demo on first
launch return [ { id: 1, name: 'Demo', created: Date.now(),
order: 0, tracks: [ { id: 1, name: 'Drums', order: 0, filepath:
'~/audio/drums.mp3' }, {
id: 2, name: ...
