Want to play back piano without voices

I looked through the Forum topics, but couldn't find the answer. There's a tune I'm listening to in Musecore that has a tenor voice (ahs), bass voice (ahs) and piano accompaniment. I would like to hear just the piano. If I switch to synthesizer mode and toggle the voices all the way down, and hit the Play button, there is no sound at all. My goal is to save the piano part to mp3 (I was able to save the voices + piano to an mp3)