"Nightingale" is a popular jam session tune. It is a lovely tune with interesting harmonies. This song is often played (sung) as a balled or medium swing. But it can also be played straight or up-tempo. This arrangement has a fusion vibe, and we've done some aggressive re-harmonization to give this old classic a modern life.
The song is rather straightforward. It is AABA song form. The A sections are each 10 bars. The bridge is a very conventional 8 bars.