sound in lua

[Adrian Sietsma <adrian_groups@...>]

i'm looking at doing some voip work (in windows), and thinking of lua...
(but that's some way off yet)

step 1: add a sound record/play library; has anyone done this ?

what i would like is feedback on posible uses / abstractions. i know 
Windows audio well, but not linux / unix.

i'm considering an abstration like io/file : off the cuff -

object = sound.open(format)
object = sound.readfile(filename)

object:record(...)

...
object.play(...)

so :  what belongs to which level of abstraction ?

i aim to (eventually) build a basic win32 sound library.
it raises some interesting threading / callback issues too.

Adrian