Track 8 of the audiovisual album Oscilloscope Music
available at http://oscilloscopemusic.com

What you see is what you hear: The audio signal is fed directly into the oscilloscope, where vector graphics are drawn with sound.
Filmed from an analog Hameg scope. The download contains a slightly cleaner looking video of this track (recaptured from a Tektronix 5103N oscilloscope).

left audio channel: horizontal deflection
right audio channel: vertical deflection

software used: Max MSP, Pure Data, Ableton Live

How to draw mushrooms on an oscilloscope with sound: https://www.youtube.com/watch?v=rtR63-ecUNo
mushroom patch (Max for Live): https://www.youtube.com/watch?v=QEh7xxDs9zg
mushroom patch (Pure Data): http://www.jerobeamfenderson.net/post/81583572716/i-know-you-want-this-heres-a-pd-patch-to-draw
butterfly patch (Max for Live): https://www.youtube.com/watch?v=Nt1PXQ2ah3A