Function midiLoopStart

midiLoopStart(file: MidiFile): number | null
Seconds from the start of playback at which the file loops (its controller-111 marker through the file's own tempo map), or null when the file carries no marker and loops from the start instead.
Parameters
- file: MidiFile
Returns number | null
Example
```
import { parseMidi, midiLoopStart } from '@datamoc/mwg/audio';

declare const midiBytes: ArrayBuffer;

const file = parseMidi(midiBytes);
console.log(midiLoopStart(file)); // seconds, or null with no loop marker
```
- Defined in src/audio/Midi.ts:281