Gnome Ubuntu Remix with Firefox, and no sound anyway. Same with Opera. Epiphany browser (the 'official' Gnome web browser) does play the sound. This is probably a Linux thing, not your app.

Where are you going with this? Just plain and simple for actual 'stream of consciousness' writing or the full skeuomorphic invocation of the manual typewriter, like

http://www.masswerk.at/google60/

did for the card punch? Either is fine by me!