This is what Sonos can do with Qobuz: https://support.sonos.com/s/article/1782?language=en_US

“What Qobuz sound quality is available on Sonos?

On Sonos you can stream up to 24-bit/48 kHz Hi-Res FLAC from Qobuz on your S2 compatible hardware. Tracks with a sampling rate above 48 kHz will be delivered to your Sonos hardware as 16-bit/44.1 kHz FLAC (CD lossless quality). Older products may only support up to CD lossless quality for all tracks. You must have a current subscription to a Qobuz Studio plan to stream 24-bit Hi-Res on Sonos.”

Reading your experience the words “above 48 kHz” could have to be read as “at or above 48 kHz”. I'd be curious to the experience of other forum members.

The native sample rate in Sonos is 44.1kHz. 48kHz content will be sample rate converted.

Since the former implies a band limit of 22.05kHz and the latter 24kHz, and both are well beyond the range of human hearing, I hardly think anyone would notice the difference.

Thanks Rallye,

I found the same article. That’s why I specifically selected a play list with 24 bit and 48khz songs. And checked that from another source device (laptop) on the same external dac.

so from my pov it seems to be an issue or setting in Sonos.

hope someone knows the answer

There’s no setting. The S/PDIF outputs are 24/44.1, whatever the source content. 

So what connection would bring 48khz to the Connect?