Before pitch correction existed, tape machines ran at the wrong speed, acetates were cut too hot, and engineers made irreversible mistakes at 2am — and somehow those errors became the actual sound of the record. This episode chases the history of accidental and deliberate pitch manipulation, from the sped-up vocals that gave soul music its desperate urgency to the half-speed mastering cult of the 70s and the moment someone played a Beatles demo at 45 instead of 33 and heard God. Pitch isn't just a musical property — it turns out it's one of the sneakiest emotional levers in recorded sound.