I don't think I ever got below 64kps in my own testing before the audio quality fell apart. I was using a Palm PDA, so I found a player that supported ogg. Tha

I don't think I ever got below 64kps in my own testing before the audio quality fell apart. I was using a Palm PDA, so I found a player that supported ogg. That allowed me to push to 48kps (or maybe even 32kps) with "acceptable" quality.