The MediaFiles module currently supports MP3 and WAV media files as well as M3U and PLS play list files. Decoding MP3 files is a CPU-intensive process. We have tested the MP3 decoder in CDSPro on 90Mhz Pentiums with success. We would consider a 90Mhz Pentium to be an absolute minimum platform for the MP3 part of CDSPro. Note that to use the synchronized visuals, you should probably have a 200Mhz or better processor.
Many factors contribute to the playback quality.
These can cause CDSPro to become sluggish. Try turning down the FFT rate. Try closing the Spectrum window.