I'm trying to decrease the sound latency of my sound library. To do so I have written a little app to empirically calculate the lowest mixer buffer value that works well on your ppcs. The program is very easy to use and if you spend a minute you can help me a lot. All you have to do is play a little with the mixer buffer length and then send me the log file (MixerLatency.txt) that the program write, it include all your try and the string that identify your ppc model.
Use one of this links to download the right file for your ppcs and, if you have time, for windows:
Thanks