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2. Does the software automatically include any filtering for distance
changes or a doppler effect for speed? (i.e. a simple room model?) Or does
it only change the volume of the sound as you get closer / further away?




According the A6 Features list the engine does include doppler.

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10. I understand that sounds can be attached to objects. But did we work out that sounds can also be attached to zones on the level?



Have you tried adding a sound using the wed? (Object - Add Sound) Or, if not you wed you could probably write a short piece of c-script code that could turn a sound on when the player/camera got close enough to a certain point.

Hope that helps. Sorry I cant answer any of the others.