I've used players CD/MP3 in the past, but now I prefer using my JamMan solo XT with an added SD card and FS3X foot switch. I have plenty of space and use WAV files. Plus the added advantage for me of the JamMan is that as a foot pedal, it is hands free. I can stop and start and scroll through songs using the FS3X. As a guitar player this works well for me, plus I think it's a better look to the audience...not a lot of button pushing between songs.