[Openal] 7-speaker sound with Mac for auditory research?

[M. Kalthoff]

Hi everyone,

i've got a little problem, and hope someone can help.
the sound is kind of chopped if i quickly move the listener or source. 
i'm updating as suggested in the effects extension guide.pdf[p. 45]
at approximately 30 times per second.
(the problem is the same but a little less noticeable if i remove the
brake and update at >100 times per second)

current hardware setup is:
	Pentium 4 2,4GHz
	512MB

	[0] "Generic Software" (default)
	    Effect Extension Supported: YES
	    Supported Specification Version: 1.1
	
	    Max Sources: 256
	    Max Effect Slots: 128
	    Max Aux Effect Slots: 1
	    Max Aux Effect Slot Sends: 1
	    [...]


current test-scene setup is:
	- 1 sound source (a looping sine wave sample)
	  at [0, 0, 0]
	  slowly rotating (10s per 360°)
	  inner cone = 45°
	  outer cone = 180°

everything sounds fine, is directional and calculated correctly,
i guess.
if i now quickly move the listener(which is attached to the camera),
the sound gets choppy as if i wouldn't update the listeners position
as often as needed.

would be nice if someone could give me a hint for fixing this.
thanks.

m. kalthoff