After listening for a while, Esperanza was able to play the music by ear.

VOA: special.2010.04.09

Our last expression is to play it by ear.

VOA: special.2009.09.13

"You know the thickness, tolerances of wood has to be exactly right for the right tone, and volume of a soundboard has to be measured exactly, and that's done mostly by ear.

VOA: standard.2010.07.06

A TV was on. My eyes were elsewhere, but my ear was caught by the unmistakable voice of Walter Cronkite.

VOA: special.2009.08.16