The band plays a steady, swinging beat in the background. The only time the volume or intensity of the instruments increases is when Fitzgerald's singing grows in intensity. The music seems to move with her, rather than her moving to the beat of the music. At the beginning of the song, the brass plays an introductory note before each phrase of his scat. When he begins to sing, the first instrument the listener can clearly hear coming in is the hi-hat, which is tapped in the classic swing jazz rhythm. At this moment the trumpet also enters. Around 1:13, Fitzgerald's next scat solo is introduced by a short brass cadence from the band.22 Throughout the song, one thing the listener should notice is that there is a parallel between the melody played by the band and Fitzgerald's scat. This parallel occurs at 2:45, when the band also increases