I use this DVI/Optical -> HDMI converter. Works amazingly well. The HDMI splitters that work well always seem to be out of stock and I could never confirm how well they work. But this works great for PS3 and PS4 Amazon Link
Never too late, I bought it little over a month ago for $6 on Steam (using DSFix, back off crazy PC people) and have loved every bit of it. Helps if you have a friends that can point you in the right direction without outright telling you how to play or telling you spoilers.