· Music won’t play or issues with my library
· Streaming tracks greyed out or unavailable
· When streaming from Qobuz i sometimes get "Qobuz media is loading slowly" messages. It used to be onyl with 192khz files but these days it often also applies to 44.1khz.
· Fiber 500 mbit/s, the Mac Studio M2 hosting the Roon server is connected by LAN
Hey @peter.schubert,
Thanks for writing in and for sharing your report! From a fresh Roon Server diagnostic report, we can see the following errors leading to playback stopping:
01/22 19:26:22 Trace: [Chord Mojo 2 optisch] [Enhanced 4,5x, 24/44 QOBUZ FLAC => DSD64] [100% buf] [PLAYING @ 1:26/5:09] Spectrum (2015 Remaster) - Billy Cobham
01/22 19:26:22 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1159832,"status":"Dropout"}
01/22 19:26:22 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1441792,"status":"Dropout"}
01/22 19:26:23 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1376256,"status":"Dropout"}
01/22 19:26:23 Info: [stats] 429921mb Virtual, 864mb Physical, 679mb Managed, 185mb estimated Unmanaged, 0,69% of runtime in GC pauses, 100ms last GC pause duration
01/22 19:26:23 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1441792,"status":"Dropout"}
01/22 19:26:24 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1376256,"status":"Dropout"}
01/22 19:26:24 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1441792,"status":"Dropout"}
01/22 19:26:25 Trace: [HIFI DSD] [raatclient] GOT [114] {"samples":1441792,"status":"Dropout"}
01/22 19:26:25 Warn: [Chord Mojo 2 optisch] [zoneplayer/raat] Too many dropouts (>3s dropped out in the last 30s). Killing stream
01/22 19:26:25 Trace: [Chord Mojo 2 optisch] [zoneplayer/raat] too many dropouts. stopping stream
01/22 19:26:25 Trace: [Chord Mojo 2 optisch] [zoneplayer/raat] Endpoint HIFI DSD State Changed: Playing => Prepared
01/22 19:26:25 Trace: [HIFI DSD] [raatclient] SENT [116]{"request":"end_stream"}
01/22 19:26:25 Debug: [raat/tcpaudiosource] disconnecting There are a few compounding stressors here: — any one might work alone, but together they’re brittle:
You’re asking Roon to do:
Right after the stop:
poor connection kbps:2673.0 (min:3674.0)Even though the buffer was full earlier, DSD playback drains buffer very aggressively. Once refill can’t keep up, RAAT starves.
For some next steps in troubleshooting - try these in order:
Leave upsampling PCM-only (e.g. 176.4 or 352.8 kHz).
If dropouts disappear, you’ve found the real bottleneck.
Instead of 2.8 MHz, try:
Device settings → HIFI DSD:
Even just as a diagnostic. USB Mojo is far more tolerant of timing variance.
We’ll be on standby for your reply and results, thank you! 
Hi @peter.schubert,
Do you have an example of a track that failed with this message in the last few days since you posted here? We’re eager to inspect a more recent timestamp in logs to compare with what @benjamin found above.
We’ll watch for your reply. Keep in mind that this thread will eventually automatically close if it stops receiving responses from the OP.
No, it didn’t happen again. Like so many times it went well for days or even weeks.
Are you sure it’s really about my audio processing? Why does Roon not tell me “Too much processing load” and instead tells me Qobuz was not fast enough?
When it happens again it will happen more than one time usually and then I will do the tests you suggested.
I’d totally understand it if my processing was too much of course, but then again my Mac Studio is no slouch.
Sounds good @peter.schubert, we’ll be monitoring for your reply and results!
Hi @peter.schubert,
To be clear, the endpoint buffer isn’t receiving data fast enough from RoonServer because Roon’s available bandwidth to download from Qobuz isn’t high enough. The server can’t download and distribute audio fast enough over the network.
The processing load isn’t the direct cause as much as the latency (and network congestion during transport) from the conversion: (44.1KHz FLAC → DSD64).
If you can provide more context about your network topology and the relative position of any mesh nodes, switches, and routers, we might be able to suggest some workarounds.
Thank you and we’ll watch for your reply.
This is a speedtest i just did on the computer where Roon Server is running (connected by LAN). Those are very typical results. I never had any problems with this quite new fiber access.
I am using a Fritzbox after the fiber to LAn converter from the ISP. It just seems quite unlikely that my network hardware should be the problem when i can stream 4k tv streams with no problems at all. I cannot tell you how well my ISP (htp) is connected to Qobuz’ ISP.
Hello @peter.schubert ,
We have seen users have a better experience in the past if they change their Router’s DNS servers from the ISP provided ones to Cloudflare DNS, Quad9 or Google DNS. Can you please give this a try and let me know if it helps?
Also, can you please confirm if the issue happens when playing to your Roon Server’s System Output zone, or if it only occurs when playing to the Chord Mojo 2?
