The Difference Between 432 and 440 Hertz

"If it sounds like to me I make the assumption that is like and I work from there to either prove myself wrong or find something," he says. "Every time we listen to a song that is tuned in G sharp or has the tone of G sharp in it, we will be listening to the vibration of the most prominent spectral line of the hydrogen atom." The 440 Hertz corresponds exactly to a chromatic G sharp with the reference key of 440 hertz. 'I've got 40 years tuning piano you don't know your butt from a hole in the ground,' Williams adds.