From the video description:
"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)."
https://www.youtube.com/watch?v=19jv0HM92kw
Sevan / Venture37