I've noticed that in period films a musical shorthand is used to establish the time. If it's set in the 40s/WWII you'll always hear Big Band music playing over the opening shot. It's usually Glenn Miller, and it will always be one of 4 or 5 famous Miller tunes: "Moonlight Serenade," "Take the A Train", "String of Pearls", "Ïn the Mood,"and maybe 1 or 2 others. If it's a vocal group it's always the Andrews Sisters and it's a similarly limited range of familiar songs: "Boogie-woogie Bugle Boy,""Don't Sit Under the Apple Tree," "Bei Mir Bist Du Schon," and a few others. It's the same with westerns. When someone goes into a saloon a rinky-tink player piano is always tinkling, usually out of sight. Those pianos had huge paper rolls with hundreds of tunes on them. They could play for days without repeating one. But in the movies they only play "Öh, Susanna," "Camptown Races,""Buffalo Gals" and "She'll be Coming Around the Mountain,"all of them actually Gold Rush - era songs. 19th century hymnals contained hundreds of hymns, but only two are heard in westerns. When there is a church service or a funeral, they always sing "Bringing in the Sheaves"or "Gather at the River." It's the same with sound effects. Whenever the scene shifts from civilization to the wilderness you always hear that high-pitched eagle screech. You can wander around forever in the wilderness and never hear that sound, but it always shows up right on cue in the movies. Likewise, you know the scene has shifted to the Vietnam war because you immediately hear that helicopter whoppa-whoppa sound. If the scene flashes back to the '60s counterculture scene, the first thing you hear is a descending sitar rill. Can anybody name other sound or music cues?