As XAPBob has already said, use a dedicated MP3/WAV player instead.
The QU’s ability of playing back MP3/WAV files is limited at best, you also don’t have an option of being able to shuffle your playback tracks, it will play them in the order that it finds them from within their dedicated folders.
I have around half a dozen WAV files that I have on a USB stick just for the purpose of eq’ing my system, for the few occasions were I have been asked to provide break music, I subscribed to Amazon Music for that very purpose and well worth the money for zero hassle.