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[rogix]

I want to send my PC’s default audio output to a DLNA DAC for the best possible latency/quality. I set Windows' default sound to the JRiver WDM driver (or VAC, VB Cable...) and tried to loopback on the DLNA DAC, but I always get the error: Something went wrong with playback. Otherwise playing on DAC or loopbacks on local devices works

I found a topic here stating that loopback is only allowed on local zones, if I correctly understand that not for external DAC. So, is there any other way to do that?

[rogix]

hmm, Am I asking the wrong question, or has no one else tried using JRiver to route default Windows sound to a DAC?

[JimH]

If you use JRiver's WDM Driver (on the wiki), you can route all sound from the PC to any directly connected device. 

DLNA devices work differently though.  They use a special protocol to send a file over the network to the DLNA Renderer. 

There is  no way to do  what you want, and it won't produce better quality sound.  Just connect your DAC directly to your PC.

[Awesome Donkey]

The WDM driver doesn't work over DLNA, unfortunately, as DLNA is file-based. Like Jim said to use it you'd have to directly connect the DAC to the PC in order to use the WDM driver.

[rogix]

Thanks for the answers, both of you. Actually, I understand the things just partially and quite possible there is no solution.
I have a high-end DAC (https://electrocompaniet.com/products/ecm-1-mkii-network-music-player), but as is often the case with such products, the manufacturers don't care about features that aren't important to them. So, I can't just connect my default Windows sound directly to the device. I can do it via Bluetooth, and since it supports AirPlay, I can use TuneBlade on my PC to emulate it. Both methods work, but there is a significant delay with both.
So, I tried ChatGPT, which suggested using JRiver for this, but yeah, they are sometimes wrong. So no reason to subscribe to JRiver for me

[JimH]

Can you not connect to it with USB?

[markf2748]

From ECM 1 MKII specs (attachment pages 5 and 17), I see it has a USB input for "External USB storages".  Apparently for stored music on a drive, but not specified for computer input (?).

The unit's DAC section has both optical and coaxial SPDIF inputs.  Would a USB to TOSLINK/SPDIF converter (unidirectional) be expected to work with MC, its WDM driver, and the PC's USB output?  There are some inexpensive ones available.