If the Projet gets many lags, the music lags, too. Often the sounds and music are synchronizated to the animations and story of a project, but also often the music is just in the background does not have to be synchronizated to the screen. So whats about a new block or just an option:
enable screen synchronization
disable screen synchronization

This will make run the music without lags, even if the screen lags.

Support.

agreed

cool! I hopre some more scratcher will agree to this, too and also the ST