One source of "jerkyness" may have been identified

Created by: tamlin-mike

Repro: Start a new game, run 30-or-so m.

Starting a new game in a debug build, while running under a profiler, I found out some lua script loaded a bunch of audio files - most if not all completely unrelated to the area I entered, and definitely not somethign expected to be played within the next seconds.

This made me realize the audio subsystem needs at least one, and maybe two, new functions.

1. preload. This one should be obvious. What may not be obvious is that it should run in another thread (think WorkItem's).
2. play_ambience. If added, this one should use the same preload (or even WorkQueue) mechanism, to not lock up the main game pointlessly.