минимал

[folgakauchuk]

http://www.randomthink.net/labs/html5drums/#11111111011111100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000100000001000000000000000000000000000000000000000000000000000001100100101000000000000000000001000100001000|120

ps не во всех браузерах. эта лучше, конечно