What is the origin of the idiom "play by ear" and when to use it?

The idiom "play by ear" has its origins in music. It means to perform a piece of music without relying on sheet music or formal notation. Instead, the musician plays based on what they hear and feel, often improvising as they go along. The idiom likely emerged from the world of jazz and other improvisational music genres. This expression is not limited to music and can be used more broadly to describe the act of handling a situation or making decisions as they come, without a predetermined plan or set of instructions. It implies adaptability and the ability to respond to changing circumstances.

What is the origin of the idiom "play by ear" and when to use it?

The idiom "play by ear" is derived from the musical meaning but extended to describe decision-making or problem-solving. Just as a musician improvises and adjusts their playing based on what they hear, making decisions by ear involves adapting to a situation as it unfolds, rather than following a preconceived plan. This expression is used to signify the act of remaining flexible and responsive to changing circumstances. It implies a willingness to adjust one's course of action based on the current information or developments.