So I wrote this HTML5/Javascript Boss DR-110 drum machine emulator...
bitrotten.com
bitrotten.com
If you hover over the buttons, there should be tooltips about how you can control it via your keyboard, which makes entering beats much less of a chore than if you were solely using your mouse.
I built this because I disagree with all the posts I see saying that say that you can basically do everything in Javascript and HTML5 that you would want to do in Flash. This would actually be very simple to port over to Flash, where it would have much more solid timing, and would be cross-browser compatible.
I hope that having this code out there, folks can make it better, port it to other browsers, maybe even iOS devices. Anyway, bottom line is, I wanted to share, and was hoping for feedback. Thanks!