sound_rays ... see the sound
beam projection and monitor have same signal, but mirrored on y-axis. the signal is analog composite video from a videotool included in the analog modular synthesizer, which is the source of all audio except the sound-spatials interferences from projector and fog machines.
some layers of sound contain sometimes sound above or below human audible range but are still existent in the first, the electronic stage of the sounds materiality, while speakers used in this setup maybe don't even transform it anymore into audible materiality of air-based sound nor activtes spatial interferences, what is more likely for sound above the human audible area. frequencies below have yet impact on all three layers / materialities of sound available, as they cause spiky and clicky sounds.
sound signal contains up to 6 analog electronic sound sources built on the modular synthesizer, some analog delay, in slightly different mix for speakers and videotool via aux post fader feed for video tool.