About “π (Pi)”

“π” (or “Pi”) is the second track from Kate Bush’s triumphant 2005 double album Aerial. The song, written in D major, has Kate describing a man’s love for numbers and an obsession calculating the mathmatical constant. One of the main inspirations for the track was Kate’s noticing how numbers are considered unemotional as lyrical content. She took on the challenge to “really care about that 9” and put an emotional element behind all of the digits.

Despite reaching the 137th digit of the constant, Kate doesn’t actually correctly sing all of the digits. For example, at digit 54 Kate sings “3 1” rather than “0”. It is this, and the absense of 22 other digits, that have caused a great discussion and debate around the Internet about Kate’s reasoning for this.