This video, via developer Alexander Zolotov, demonstrates using Virtual ANS to convert fractal images into synthesized sound.
Virtual ANS is a software simulator of the unique Russian synthesizer ANS. The original ANS is a photoelectronic microtonal/spectral musical instrument created by Russian engineer Evgeny Murzin from 1938 to 1958.
Virtual ANS is a cross-platform app, available for iOS, Android, Windows, Linux and OSX. See the ANS site for details.