The clip is catalogued as a Hollywood Edge bugle fanfare and is associated with the Disney Goofy cartoon A Knight for a Day, released on March 8, 1946. First call is the traditional bugle signal used at horse races and ceremonial starts to call participants to post, which is why the same short pattern appears in cartoons, sports broadcasts and stage shows. Its cartoon use helped fix it in popular memory as a universal cue for beginnings, so editors still borrow it whenever a scene needs instant ceremony or a playful official start.