On Mon, Mar 04, 2013 at 03:46:21PM EST, John J. Boyer wrote: > This is a bit off-topic, but how can one calculate the frequencies that > correspond to various musical notes. I would like to set my grub to play > the first few bars of Beethoven's Ode to Joy. There is an algorithm to work this out. I used to know it, but can no longer remember it. Luke