What does AABA mean in musical term?

In musical terms, AABA is a common song form or chord progression. It consists of four sections, with the first and third sections being the same (A) and the second and fourth sections being different (B). The progression can be represented as AABA or AABB, depending on whether the fourth section is the same as the second or not.

Here's a detailed breakdown of the AABA form:

- A: This is the first section and it typically establishes the main theme or melody of the song. It can be a verse, a chorus, or a bridge.

- A': This section repeats the A section, either exactly or with slight variations.

- B: This section provides contrast to the A sections. It can be a bridge, a chorus, or a verse, and it often introduces new musical elements or lyrics.

- A: This section returns to the main theme or melody of the song, often bringing the piece to a close.

The AABA form is widely used in jazz, blues, and popular music. It allows for a balance between repetition and variation, creating a sense of familiarity while still providing opportunities for improvisation and musical development. Some famous examples of songs that use the AABA form include "All of Me" by John Legend, "Over the Rainbow" from the movie The Wizard of Oz, and "Stand by Me" by Ben E. King.