Interesting little drum app, here’s “Bleep’s” description:
What the bleep is this?
…it’s an addictive wavetable drum machine with midi! Draw pitch and wavetable modulation to create chip-tune sounds and effects, then sequence them to make retro video game like beats! You can create 12 sounds per song and save up to 8 songs that you can switch, shuffle and randomise on the fly. Midi support enables you to trigger your sounds with a midi device.
The app is priced at $0.99.