placed the audio data as a modulated pattern between the perforations of the film print. This required new playback equipment—specifically, the Dolby DA20 processor and film readers. The first film to use Dolby Digital was Batman Returns (1992), but only six theatres worldwide were equipped.
A spectrogram analysis reveals a frequency sweep from 30 Hz to 8 kHz over 4.5 seconds, with a transient peak at 120 Hz (the “impact” sound) and harmonic content up to 16 kHz (the chimes). End of Paper dolby digital in selected theatres logo
Figure 1: The logo’s first frame (1992): deep blue background, “DOLBY DIGITAL” in silver text, rings beginning to rotate. Figure 2: Mid-animation: rings overlapping, lens flare illuminating the word “SELECTED.” Figure 3: Final locked frame: flat “Double-D” logo, smaller text “IN SELECTED THEATRES,” fade to black. placed the audio data as a modulated pattern