Is there a way to output 5.1 OS wide in Windows? I also have a Syba USB sound card/headphone amp with optical and coax digital out, sadly, it's 2.1 only. Lacking an optical port on my Logitech speakers, and the requisite number of analog jacks on the Mac Pro, I am able to at least play back Dolby Pro Logic using the Technics hooked up the Mac, and then the speakers to the Technics.
The Technics is an antiquated obsolete piece of technology that was probably replaced by a 5c chip on a $15 Wal-mart DVD player a decade ago, but it's free and it's what I have. I have a Logitech X-540 and a Technics Digital SH-AC500D Surround Sound Processor, both which I got for free. There doesn't seem to be support for 5.1 sound using SP/DIF. I'm using a Realtek sound chip in a Mac Pro 2008 with Windows 11.
