Derek Holzer (b. 1972) is an American sound artist living in Berlin, Germany whose current interests include self-made analog electronics, sound art, field recordings and the meeting points of electroacoustic, noise, improvisation and extreme music. He has played live experimental sound, as well as taught workshops in noise art technology, across Europe, North America, Brazil and New Zealand.

He has performed live audiovisual sets using laptops and the pure data programming language since 2001. During this time, Holzer became frustrated with the performance limitations of the computer and began new experiments with all-analog systems. These experiments came together during a workshop on art for the overhead projector at the Moltkerei in Cologne, Germany in 2007. Inspired by some of the pioneering 20th century electronic music instruments such as the ANS synthesizer, the variophone and the oramics system, Holzer developed electronic and graphical systems for playing light on the overhead projector.

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