Jazz has a curious duality. Instrumentalists are often told to learn the lyrics so they understand the phrasing of the melody. Conversely, vocalists are often t

Jazz has a curious duality. Instrumentalists are often told to learn the lyrics so they understand the phrasing of the melody. Conversely, vocalists are often told to listen to instrumentalists performing the same song. So both are trying to approach an ideal performance from opposing starting points.