THX is a logo where some white text that reads "This auditorium is equipped with a THX sound system...", but some seconds after, the background turns into a red-black cloudy BG. And we see some white text that reads "The audience is listening." After that, the red-black BG turns slowly turns blue, somewhat similar to the previous BG. Seconds after, a light with lens flares moves upward and a 90° turned THX logo rotates to its front in a blue-black gradient BG, with "LUCASFILM LTD" over and "SOUND SYSTEM" below. The Deep Note can be heard in the background.