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Good app its hard to make a good beat, you should be able to make your own melody using the pads record that and then put it in another screen and then loop it for how long you want to loop it for,
And then you can record the snare in and put it with the melody, the kick, the hi hats, ECT, that would make this a 10 star,

BigDChapo about Trap Drum Pads 24