I got this Philips PM 3305 second hand, and I know it can display music in the x-deflect mode, but I don't know how to hook up the probes to display music.
PM3250 X · Historical Measurement Equipment Museum · HME
Philips PM 8932 Probe, 20m ohms 2pf 4kV - Global Test Equipment
Dual Time Base Oscilloscope 100 MHz PM Equipment Philips; Eindhoven | Radiomuseum