In 1986, Dunn created the electronic music software, MusicBox. He released it as "freeware" in the public domain. At the time, it was the only electronic music software of its kind to be available on PC platforms. In the 1990s, Dunn founded Algorithmic Arts, an online company that primarily produces electronic music software. He released a variety of software programs in the 1990s and early 2000s, including the Kinetic Music Machine, SoftStep, BankStep, and ArtWonk, all of which incorporated details of visual art and design. SoftStep was a Windows-based MIDI step sequencer and "algorithmic-composing program." ArtWonk, another algorithmic composition program, implemented algorithmic visual art, the use of mathematical functions, and DNA and protein sequencing with contributions from expert users.
The Kinetic Music Machine, SoftStep, and BankStep were three of Dunn's programs that could make musical renderings of DNA. Dunn's wife, biologist Mary Anne Clark, helped in the creation of these programs. Dunn and Clark used both DNA and amino acid protein sequences to produce renderings. They wrote an article on the subject of "sonifying" protein sequences ("Life Music: The Sonification of Proteins") that appeared in the February 1999 edition of the journal, Leonardo. The two later rendered music from the DNA of vampire bats, sea urchins, slime molds, and the human sex hormone.
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