Matthew Tyas has been an excellent source for videos relating to DIY synths, but now he's providing YouTube with what it needs most: MOAR CATS! Here is a mad tune from an Axoloti, while curious kittens explore it.
Homemade synth and kittens
A synth isn't a real synth without a kitten & synth clip, so here we go.
The music was made by overdubbing the synth in question (an Axoloti)