A demonstration of ammobox, a new free virtual instrument that lets you scratch audio by triggering samples asyncronously with MIDI. The turntable provides velocity and rotation control.
Creator Nathan Ramella (aka Synthesizer Patel) says:
What you see on the screen is me dropping MIDI notes into an Ableton Live MIDI loop, as each note is hit, it injects the sample into the stream allowing me to scratch it.
It should be noted that this is a pretty unique method in that it allows you to ‘latch’ sounds and hold on to them after they would have terminated due to the note-off event or the sample being over, you can then overlay samples and build up layers of them while scratching.