PAL LaserDiscs have a slightly longer playing time than NTSC discs, but have fewer audio options. PAL discs only have two audio tracks, consisting of either <answer>two analog-only tracks on older PAL LDs, or two digital-only tracks on newer discs</answer>. In comparison, later NTSC LDs are capable of carrying four tracks (two analog and two digital). On certain releases, one of the analog tracks is used to carry a modulated AC-3 signal for 5.1 channel audio (for decoding and playback by newer LD players with an "AC-3 RF" output). However, older NTSC LDs made before 1984 (such as the original DiscoVision discs) only have two analog audio tracks.
Which two audio options are available on PAL LaserDiscs?
two analog-only tracks on older PAL LDs, or two digital-only tracks on newer discs