Ability to integrate w/ custom UI

[kyledecot]

I'm wanting to create a custom player UI for my application while still utilizing AlphaSynth under the hood. I'm using ThreeJS for this and AlphaSynth does a great job in providing midi events via midiEventsPlayed however a lot of other events are not available at this level (playedBeatChanged for example) not to mention the data model (notes, beats, chords, etc). These events/information seem to be very tied to AlphaTabApiBase which requires a UIFacade. I had considered implementing my own implementation of IUiFacade however it doesn't seem to be exported so I'm unsure of what to do.

A few ideas I have to consider are:

• Allow custom implementations of IUiFacade
• Moving events "lower" (either into AlphaSynth or into a new layer (AlphaPlayer?) that sits between that holds knowledge about notes, beats, etc but not how to render them).