Feedback is a pretty fascinating tool for sound design. With a tiny burst of sound and a delay with a long feedback tail, you end up with a tone that's known as Karplus-Strong Synthesis. In a new tutorial, Iftah Gabbai from Skinnerbox demonstrates how to create a feedback synth in Live:
Make a Feedback Synth Using Live's Effects - Tutorial from Skinnerbox
Iftah Gabbai's feedback synth - laser cat optional.
Interested to hear more feedback synthesis? Here's "Stiff Neck", from Errorsmith:
And here's a classic piece featuring tonal short delay from This Heat:
Lastly, check out Craig Leon's "Four Eyes to See the Afterlife":