:-) Wasn't trying to be offensive - it's just that from my own experience, "I haven't changed a thing in two months" does not necessarily mean that nothing actually changed.
Glad it's all working fine for you now.
Not sure, but possibly the default sound output in Windows changed during the 2 months, and it somehow changed the foobar2000 settings?
It's unclear from your original screenshot what device foobar2000 was trying to ouput the sound to. Possibly - not SMSL at all?
Your "sample rate 1411200" suggests that it's your plugins' issue, not a hardware issue.
It tries to play it as PCM or DoP or something.
44.1kHz/16-bit: 44,100 x 16 x 2 = 1,411,200 bits per second (1.4Mbps) - nothing to do with DSD512.
Install the correct plugins and you should be good to go...
FYI, XMOS USB driver 5.30 is available, seems to be working fine, not that I had any issues with 5.12.
https://www.smsl-audio.com/portal/product/downlist/id/11.html
FYI, got an iFi Zen Stream today (for 90% Tidal/10% Internet Radio) and seems to work fine with M500.
Displaying MQA on M500 when playing Master tracks.
In case you are considering:-).
Buy where you can return.
1) An audible improvement or not will depend a lot on who you ask
2) It'll depend on the audio path including the source as well
3) I would be skeptic about ES9038PRO sounding A LOT better than PCM1795 (and I have an M500 and a couple of Burr-Brown based DACs)
4) To...
Did you try to update firmware and back to stock version?
I suspect that's what happened.
What is the firmware version in XMOS control panel? E.g. mine is 2.06 (see the attached image).