Hi John C.
Ref you trying to record a MP3 file if you use the audio recorder for Technics and the USB lead the files are offered as WAV. or to save as MP3. AS you say the MP3 quality is a lot lower, when you look at it MP3 is really set up for the younger generation using those personal stereo's with headphones that are about as accurate at producing quality sound as a blunderbuss is for target shooting.

Best Regards John D.