What browser are you using that hasn't blocked autoplay audio? Firefox, Chrome, and WebKit all didn't on my computer.
FWIW, Firefox has become unpredictable in it's blocking of autoplay for me. It works for me almost all the time it seems, but every so often something will autoply anyway. I can't figure out the exceptions, and don't know why Firefox allows them. It seems fairly straightforward to me.
Chrome on mobile. I do block scripts on my computer, but on mobile I haven't bothered so far.