We are not getting any real audio support until either Firefox stop being lazy and start using the webaudioAPI or until Scirra decide to create a more advanced audio object which is only supported by the Chrome based exporters.
In my eyes C2 is still in beta because the audio support is so lacking and there's no way I can launch a game using C2 because of this. I mean I could launch a game but it would essentially be half the game it could be.
Though I do understand the problems faced with supporting multiple browsers and I'm sure audio will be supported eventually. Even the game studio I work at during the day is scared sh*tless of HTML 5 audio, but we recently made the decision to focus on Chrome so things are moving smoother now.