Function collectSoundFontUsage

collectSoundFontUsage(files: readonly MidiFile[]): SoundFontProgram[]
Every sampled voice the given MIDI files can request, as (bank, program) pairs: the channel voice in effect at each scheduled note, with drums mapped to bank 128 the same way the renderer maps them. A game's compile step feeds this straight into subsetSoundFont so the shipped font carries only these programs.
Parameters
- files: readonly MidiFile[]
Returns SoundFontProgram[]
Example
```
import { parseMidi, collectSoundFontUsage } from '@datamoc/mwg/audio';

declare const midiBytes: ArrayBuffer;

const usage = collectSoundFontUsage([parseMidi(midiBytes)]);
console.log(usage.length);
```
- Defined in src/audio/SoundFont.ts:467