Scoposcopy: Best of Lissajous For You #2 (new print)
The Tek RM503 and the Four Oscillators present: Lissajous For You #2 (with realtime audio)
The oscillators are:
WaveTek Model III
DuMont 324
General Radio 1310B
Interstate F43
Each is set to produce a sine wave and is connected to either the inverting or noninverting inputs of the X and Y channels of the classic antique Tektronix RM503 Precision Low Frequency Oscilloscope.
Let your brain entrain the waves. Relax and listen and observe.