According to hamoid's link my browser has had HTML5 Audio support for almost three years. Yet when I enable plugin on demand, soundcloud (old or new) doesn't work and I have to enable flash. That's Opera. Firefox doesn't work either as was already mentioned.
Every html5 audio test I've found worked just fine. Except for Apple's, because it, similary to soundcloud, sniffs user-agent to serve different version of a site.
Ah, that would make more sense, thanks for pointing that out. Although it's sad that "we" went for expensive Mp3 again when we had a chance to change it. And by "we" I mean chrome. Firefox held a strong stance for quite some time, but had to cave in eventually.
Every html5 audio test I've found worked just fine. Except for Apple's, because it, similary to soundcloud, sniffs user-agent to serve different version of a site.