The general smoky murkiness of starship bridges also creates picture flaws. These images often look rather fuzzy and ill-defined. More satisfying is the Dolby Digital 5.1 soundtrack of ST IV . The forward soundstage is very broad but nicely spatial, with convincing imagery that places audio in specific spots but blends it together nicely. The surrounds aren't tremendously active, but they add to the experience with some effective backing, and we even hear some decent split surrounds on occasion.
Sound quality seems pretty good.
Dialogue appears largely natural and clear, although some edginess and slight distortion occasionally occurs. The score appears quite bright and vivid, with depth as well. Despite the age of the mix, ST IV manages to offer a very satisfying audio experience. ST IV 's light on supplements, but it's more packed than any of the other Trek films to date. The main attraction is a nine and a half minute featurette with director Leonard Nimoy.