432 vs 440Hz: Science or Codswallop?

A432 vs A440Canadian band Walk Off the Earth posted excitedly on Facebook that they had just recorded a new song. Great. I like WOTE and look forward to their new song.

What was really different about that notice was that they also said they had changed their instruments from the standard A440 to A432 tuning, and it made a huge difference to them:

For all the music nerds out there, you might want to look into this. This has not been 100% proven but the evidence is building. When we were in the studio recording our latest album “Sing It All Away”, we decided to experiment with recording our songs in A=423Hz and also Standard A=440Hz. When we compared the 2 different tunings we unanimously chose the 432 tuning as the one that made us feel better. Hence, our album was performed and recorded in this obscure tuning.
Anyway, this is a cool read and if you’re feeling fancy, try tuning your guitar to 432 and give it a jam. You might feel the vibrations of Mother Nature in your soul!

Do you smell woo hoo in that? What difference would a mere 8Hz make? After all, it’s barely audible; a mere 1/6th of a tone.

Plenty, according to some (especially the wingnut population on YouTube, always eager to jump on whatever pseudoscience bandwagon is in the parade). It’s become one of those internet True Believers’ issues. But is it real or just hogwash? Objective reality or merely subjective? Let’s start with a little history and some science (and not the woo hoo Mother Nature stuff…).

A440 means that the middle A (A above middle C, or A4) is tuned to produce a note at the frequency 440Hz. One Hertz or 1Hz is one cycle per second. Your typical North American electrical current is 60Hz. The range of human hearing is roughly 20Hz to 20KHz (20,000Hz), but we are most sensitive in the range between 1K and 4KHz (some reports say 2-5KHz) – much higher than either A432 or A440.

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