SONY Checking Dolby Surround Japan LD 50LS5016
LD Tune-Up Japan LD-Single Laserdisc LPR-003
SONY Trinitron Color TV Demonstration Disc Japan LD Laserdisc 89LD1021
Dolby Digital Experience Japan LD Laserdisc PILW-7006
Sound Triangle Japan LD Laserdisc CSLW-1365