first off, we don't support wma, but we do support mp3
as far as converting .cda goes, it works with both products fine, and it works very easily in fact.
with switch just drag and drop the .cda files into the Switch window, set the output to mp3 and hit the convert button
with Wavepad just go to File -> Load CD Audio Tracks and load your tracks, then do a file -> save as to save them
remember not to take the CD out of the drive, since the software has to read from the CD to extract the audio.