Thank you for the links! The gigaport ex is $180 and doesn't have great reviews. The Topping DM7 is $600 which is far to rich for me. The other two links appear to be DSP, is it possible to use them as usb interface?GIGAPORT eX is the perfect device for 7.1 surround sound applications as well as for DJs. Due to the pre-listening function...www.esi-audio.com
DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audiowww.daytonaudio.com
This is a review and detailed measurements of the Topping DM7 8-channel balanced USB DAC. It was sent to me by the company and costs US $599. The DM7 is simplicity in itself as you can tell from its rear terminals: USB input is the only one provided which is just fine with me. And seems...www.audiosciencereview.com
I am not certain what you are looking for in a multi channel DAC but the above four are reasonably , even bargain priced. There are likely others I don't know about.
I also found the MOTU UltraLite-mk5 for $650, the Okto dac8 PRO for €1 373, the M-Audio ProFire 2626 Firewire Interface for ~$130 on ebay (but you have to find a computer with firewire?), or a DIYINHK diy DAC (not hearing great things).
or a 5.1 SoundBlasterX PCIe card on a raspberry pi 4 CM with io board? Now that sounds like a bad idea.
The other steaming possibility I found was using a raspberry pi or other computer to stream via HDMI or USB to a receiver that will accept DSD. This seems intriguing, but it seems like a lot of the "normal" streaming software doesn't work for this. Maybe jriver or kodi works based on some quick searches. Would love to hear if someone has a setup like this!