I know it used a stylus and it was a "Capacitance" disc, but after that I'm baffled. What is a Capacitance disc? (I've mostly finished my BSEE so I'm not afraid of a deep explanation...) And I guess I'll post this separately if need be, but how does laserdisc work? the disc is read by a laser, but if it's not digital, (I've heard it's analog), how is it read? Is it pits that deflect the laser to different photoelectronics? or does it somehow reflect a continuous stream to reproduce a signal?