Can I leave parts of the music naked (standalone) in my recording?

You must not leave the music “naked” (without an accompanying voiceover) for longer than 2 minutes at any interval. And the entire duration of the music must contain at least two thirds of voice-over.

For example, you could create a 30-minute hypnosis recording in which 20 minutes in total contains your voice, and the remaining 10 minutes is broken up in intervals of silence for no longer than 2 minutes at a time.