Yes, by installing osspd, sound is enabled again. But listen to it... we have a big audio quality problem.
(and sound was working fine without osspd before)

I encounter the same problem as OP, audio is disabled in Linux Mint 19.1 using Factorio 0.17.4.
Sound works fine in other applications, and in older versions of Factorio.

Edit : It doesn't work anymore with older versions of Factorio. I don't know what has changed, it was working when I last ...