DIY 'Macumbista' noise, feedback machine!
A short demo of my 'Macumbista' sound box. Built at a workshop in London with sound artist, Derek Holzer a few years ago. It is a simple amplifier circuit with a speaker. The spring has a contact mic attached to it and it generates feedback when it's placed on the speaker. The touch points connect to various parts of the circuit so you can circuit bend it with your hands.
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