For some reason OpenAL works fine but SDL Mixer has popping noises. Both
work fine with an older Linux distribution although OpenAL seems a bit
delayed.

I made a program to illustrate this. Could some people please give me
feedback to let me know how the tone sounds with SDL Mixer on your system?

http://www.cdbiemoutpost.org/data/sndtest.tar.gz

I tried setting the environment variable SDL_AUDIODRIVER and it seems like
dsp/dma work the best. There still is ticking at times though.

Also is there any way to fix this?

Thanks in advance,
Charlie