spessasynth_lib/src/sequencer/README.md

MIDI and SoundFont2/DLS library for the browsers with no compromises

## This is the sequencer's folder.

The code here is responsible for wrapping the `SpessaSynthSequencer` from `spessasynth_core`.

### Message protocol:

#### Message structure

```js
const message = {
    messageType: number, // WorkletSequencerMessageType
    messageData: any     // any
}
```

#### To worklet

Sequencer uses `Synthetizer`'s `post` method to post a message with `messageData` set to
`workletMessageType.sequencerSpecific`.
The `messageData` is set to the sequencer's message.

#### From worklet

`WorkletSequencer` uses `SpessaSynthProcessor`'s post to send a message with `messageData` set to
`returnMessageType.sequencerSpecific`.
The `messageData` is set to the sequencer's return message.

### Process tick

`processTick` is called every time the `process` method is called via `sequencer.processTick()` every rendering quantum.