merge "speaker" audio with "asset" audio into single universal format

[hburgund]

It is worth considering a more universal format for Roundware audio. Technically, there are not many differences between the two and it seems to me that if we had a single model, we could simply have a field that signified if the audio was continuous or momentary i.e. Speaker or Asset.

Asset vs. Speaker Audio

Asset audio	Speaker audio
plays once	loops continuously
plays selection of source audio file	plays full file, looped
fades in and out based on Audiotracks	attenuates by physical location of user in relation to range shape
mono	stereo
local source file	can be sourced locally or from any mountpoint online
mp3/wav file	mp3 audio stream

When we start designing for client-side mixing, this should be a part of the discussion.

[hburgund]

@subelsky tagging you per previous discussions we have had relating to client-side mixing...would love to hear your thoughts on this.

[subelsky]

I definitely agree; ideally we'd eventually move to a scenario where all audio files are treated the same, and all of the features like looping, fading in and out, geofencing, etc, are instead parameters of the "script" of each piece, describing how the assets are used