"That's All Folks!" is a well-known phrase that originated from the closing sequence of Looney Tunes and Merrie Melodies animated cartoons produced by Warner Bros. It became the official closing tagline for these cartoons.
As for the specific soundtrack you mentioned, "That's All Folks!" is often associated with the ending credits of various Warner Bros. productions. The music typically accompanies the iconic image of Porky Pig stuttering and saying, "Th-th-th-that's all, folks!" This musical cue has become ingrained in popular culture and is instantly recognizable to many who grew up watching these classic cartoons. The soundtrack itself is a short, catchy tune that adds a memorable touch to the conclusion of these animated shorts.