Hi @alex_h,
Thank you for the update. I understand you are working on the Qobuz backend issue.
However, I want to highlight something that may point to an additional factor beyond the general Qobuz problem: the same Qobuz account streams 24/192 FLAC flawlessly from my iMac on the exact same LAN (same switch, same ISP, same router, same Qobuz subscription). The stalls only occur when streaming through the Mac Studio M3 Ultra as Roon Core to my Dutch & Dutch 8c endpoint.
The signal path is: Mac Studio (1 Gbps, port 3) > TP-Link TL-SG108E switch > D&D 8c (100 Mbps, port 4). When I move Roon audio output to the iMac instead, identical hi-res tracks play without a single buffer drop.
This suggests there may be something device-specific or network-path-specific in addition to the general Qobuz CDN issue.
From my Mac Studio Roon logs (3-day session):
- 1,822 prebuffer sleeping events
- 90 poor connection warnings (kbps dropping to 2,700-5,600 vs the 6,400 minimum needed for 24/192)
- All stalls exclusively on 24/192; 16/44 plays fine at 100% buffer
- General internet speed from Mac Studio is 620 Mbps (fast.com) / 365 Mbps (Cloudflare CDN) - only Qobuz CDN is slow
I am happy to share full Roon logs or run any diagnostic tests if that would help narrow down whether this is purely the known Qobuz backend issue or something additional.
Best regards,
Ugur