Add support for different audio format

[bigtimebuddy]

Suggest using a glob-like API which allows you to set type for loading different audio files.

PIXI.sound.add('music', 'sounds/music.{mp3,ogg}');

In this case, mp3 would be loaded highest-priority with fallback to ogg.

[englercj]

most systems use an array of urls and chose the one the browser supports at runtime. For example, I use different paths for different formats of sounds.

[englercj]

The loader does this by adding each url as a "source" and letting the browser decide which to load.

[bigtimebuddy]

Yup, that's my assumption too. In my example above, if sounds/music.mp3 cannot be played, will use sounds/music.ogg. I wanted something that's not super verbose. Currently pixi sound only supports a single file.