Samplist is a MIDI sampler instrument which allows you to chop a sample into different parts and play them with the on screen keyboard or a MIDI keyboard.
Realtime Timestretching
Sample your own sounds
Audiobus
Inter-app Audio
MIDI in, both wired & via Bluetooth LE
Sample import from Files app or "Open in..."
Export slices as Zip file to other apps
Each slice has its own Filter, Envelope & Realtime pitch shifter.