Is there any way aside chmod to permanatly set permissions of the mixers, dsp, and the like? I rebooted from Winders today and found to my dismay that /dev/mixer and /dev/dsp were not useable by users, I chmod both to 7777 so they work.
here is the device file explanication PET
device file pet
and here is
beyond normal permisions PET, i am not sure if they can help in your case but they make for good reading, the section that did look useful was the Also Worth Knowing section.