SONY Checking Dolby Surround Japan LD 50LS5016
LD Tune-Up Japan LD-Single Laserdisc LPR-003
Demonstration for LaserVision VideoDisc Japan LD Laserdisc LVAP-1014
Dolby Digital Experience Japan LD Laserdisc PILW-7006
Sound Triangle Japan LD Laserdisc CSLW-1365