https://bugs.freedesktop.org/show_bug.cgi?id=95358
--- Comment #1 from Andy Furniss adf.lists@gmail.com --- FWIW I found an old build of 4.7-dal that did have sound - though it was early, 23rd March and I don't have any builds in between.
I see if I git reset --hard 4.5.0-rc7-g629edea (the version of that build) I can get a new working build and seemingly git history from that time.
If I had more builds I guess I could narrow it down like that - but I don't and I don't know how get the historic head versions from git - is that possible?