If you ask Elf Audio's Marek Bereza, many music samplers are too fussy -- you're focused more on making tiny edits than, well, making music. He's trying to remedy that with his new Koala sampler. Inspired by the late J Dilla's knack for creating tracks with a BOSS SP-303, the iOS app is not only designed to be easy to understand, but doesn't give you ways to micro-manage your tunes. You just record samples with your device's mic, create sequences and perform those sequences with effects like pitching and stuttering. You can resample if you'd like to put your audio bites through effects, such as dropping them down an octave.