You know, I got my high score when I was listening to the tones with headphones on my computer at work (where I was doing an online AJAX tutorial that had an audio component that I figured my coworkers didn't necessarily want to listen to *g*). When I tried it at home with external speakers, I got what you got, and when I did it with the built-in computer speakers, I got the next step lower. So, I'm thinking that the frequency response of the speakers may make a difference. ;-D