Ancillary as far as I know, this touch to start music is a chosen limitation by safari's devs, and so working around it won't work (it requires by design a physical touch input from the user to make sure no music will play without the user wanting it), I could be wrong though.
Still annoying that browser vendors takes decision for the sake of "user experience", it is not their job to "fix" a website issue, at least they could give a way to ask the permission to the user "do you want this page to be able to play sound files ? Yes/wait for my confirmation/No".