Not sure if you have seen this Sample Slice Mode wish list post, but it would help voting for this as a future feature for Play, hopefully it’s a feature thats in the works, it’s got a good number of votes.
The slicing feature would not only be cool for drum breaks but you could also create a sample chain of say, different chords progressions of a synth sound you like and use the slice feature to play these back via Play, another cool addition to this would be if you could say select a particular sample slice and be able to play it back chromatically, I should add this to the sample slice post.