And honor the "Remember Playback State" when playing a group. Mutex behavior would mean that starting play on a clip would stop play on other groups and play all previously playing clips in the newly playing group. Currently mutex groups only work with the All loops play together. When building song sections real time, its would useful to have clips that are stopped within the group until manually starting then (say for bringing in an organ clip during ONLY the third chorus... for building dynamics of song).