If you don't want a part of the song not to be played on the playlist, you can either:
- Put the part you want to "mute" on a different pattern... or make a pattern where you have only the channels you want... (ex: If you want to mute the kick on a pattern where there is a kick, a snare and a piano... just make a pattern with just the snare and the piano...) And make your playlist accordingly
- Make an automation on the mute buttons