[errozero]

Because of the mapping of the typing keyboard to musical notes. F would represent E# which doesn't exist on a piano. H should work though. I found a pic that explains the keyboard layout better than I could:

https://sourceforge.net/p/vmpk/shared-keymaps-and-instrument...

[moron4hire]

Okay, that makes a lot more sense. I wasn't able to figure that out by just hitting the keys.