Yes. Installed from the CD image burned from archive.org (5.0.3 Pro PPC and Intel: https://archive.org/download/BeosVersion5.0.3IntelAndPpc). I had to install it on an external BlueSCSI on my PowerMac 6500 because the CD wouldn't work in the TAM. But I then took the image and successfully used it on my 6400/200, my TAM, and my 5500/225, all work properly with sound.Let me just make sure I understand - you used the archive.org copy? I'm starting to wonder if there is something going on apart from the driver at this point.
I'm assuming sound works otherwise on the machine - boot up chime and in MacOS?