The music of Yeasayer is known for otherworldly synth sounds and falsetto harmonies. But there is always a sense of unpredictability with each new album from the Brooklyn band.

Yeasayer's fourth full-length, "Amen & Goodbye," is out April 1. The band has shared the single "I Am Chemistry," which kicks off with a bizarre flute riff and singer Chris Keating's puzzling lyrics before concluding with a children's choir. 

Download "I Am Chemistry" via the link above.