Is there a way for us picky folk to choose the music we play on a stage with?

I know that if your waiting room song is playing its classic theme, you get the classic stage track/track 1 and when waiting room is playing NES mix you get the new stage track/track 2.

If there isn't a way to pick it (which I don't think there is) could a simple key press be implemented? For example, while selecting stages, if I hold down block before choosing stage, the classic theme will play. And if I hold down grab, then the new theme will play.

Or it could be like in ssb4 where you have the option to make which music is most likely or unlikely or not at all able to play (maybe not but just another idea).