[prashnts]

Very cool! It'd be great if you could also serialize the notes to the url, so people can share these.

[bambax]

An implementation:

http://www.bambax.com/beatboxer/index.html#x||||x||||x||||x|...

Edit: now also saves bpm value: http://www.bambax.com/beatboxer/#x||||x||||x||||x||||||x||x|...