Alexander Chen, on his discoveries made while making MTA.me:
The first thing I tested was the ability to multishot a single <audio> sample. Doesn’t work. The currently playing sample gets cut off. Next, while Flash only seems concerned with how many sounds are actually currently playing, HTML5 doesn’t even like mere existence of too many <audio> elements. (I also tried using pureAudio objects instead – same is true.) In Chrome, starting around the 9th <audio> element, they simply won’t play().