Sorry, I made a mistake: I was thinking you are producing sound when the player hits a key - but you aren't. I think that's not part of the "guitar hero" concept anyway (it is in a drum version I saw in an arcade; a different story).
Anyway, I found that java can play user-triggered sounds instantly (or perceived as such), whereas Flash can't. I experimented with this in Flash, researched it/asked about it on FlashKit - and all the Flash music games I found with triggered sounds suffered from this same problem. So it's very likely true, but not relevant for you. :-)
Anyway, I found that java can play user-triggered sounds instantly (or perceived as such), whereas Flash can't. I experimented with this in Flash, researched it/asked about it on FlashKit - and all the Flash music games I found with triggered sounds suffered from this same problem. So it's very likely true, but not relevant for you. :-)