I have tested Lumin U2 USB output to RME ADI-2 Pro FS for the following sample rates from Roon DSP Engine upsampling:
32 bit 768kHz
32 bit 705.6kHz
24 bit 768kHz
24 bit 705.6kHz
All are working normally. So I have no reason to believe Lumin or Roon (build 1582) to be at fault.
Please recheck you do have the latest hardware and firmware for your USB DAC.
If you are sure you have the latest hardware and firmware for your USB DAC, and it is advertised to support the 7xx kHz sample rates, please try all these upsampling targets individually, plus 16 bit as well.
Yes, newest firmware installed in the DAC. Peter, did you upsample a 24/192kHz file to 768kHz? Again, it probably won’t happen immediately but give it time (several tracks).
EDIT: Another thing to try is upsample only 44.1 files to 706.6 and leave all others as-is. I shuffle my entire music collection 99% of the time. In my files are contained 44.1, 96 and 192kHz as well as DSD64. Again, randomly play back these files and only upsample CD rips. Just for the record, I have plenty of space, so I do not use FLAC. Only upcompressed WAV and dsf files.
Hi Peter. Thank you. How about just upsampling 16/44.1 to 705.6? I tested last night and it was great for close to 60 minutes. Then i got static. Looking at my Playlist, it happened after a 24/192 file and maybe three to four 16/44.1 tracks before the issue happened. So as i mentioned, please give it some time.
With Lumin U2 USB output to RME ADI-2 Pro FS, I tested:
100 minutes of Qobuz 24/192 Roon upsampled to 32/768, followed by
400 minutes of Qobuz 16/44.1 Roon upsampled to 32/705.6
Playback is normal.
As stated before this is DAC being unable to lock on to 7xx kHz signal, if 3xx kHz playback is perfect. If even 3xx kHz playback is not perfect, we’ll need to look elsewhere, and perhaps change the USB cable as the first step. There are also multiple USB ports on the U2 that can be used for DAC connection (for one DAC only).
USB Cable made no difference. First issue was on a 768kHz track (24/192) maybe 5-6 tracks into listening session. I seriously doubt the USB port will make any difference but I could try another. Only used the USB DAC port out of the U2 thus far.
Ok Peter. I tried another USB Port tonight. I just set 96 and 192 to upsample to 768. I chose the Zeppelin remasters, so 192. First track, massive distortion. Then, the Lumin stopped outputting sound completely. A hard reset was needed to get any sound back. I know theres always a lot of finger pointing when a customer has a problem with multiple manufacturer units but this seems like the Lumin may very well be at least partially responsible. But I don’t care which unit or if its software, I would just like it fixed is all. Thanks.
That was not a fun exercise but I finally got the Roon server moved over to my DAC and tested. Same result So what does this mean? Ayre is claiming its a ‘handoff issue between Roon and the QX-5’, which is why I decided to post here.
With Lumin out of the chain, and you still got this issue, so this proves Lumin is not the problem. I am sure this is not a Roon issue either. I have already stated multiple times what the root cause is.
However, proving this is a DAC issue is more difficult. If your computer is running Windows, you can try to install Audirvana (or any software capable of playing 768kHz). I think Audirvana is capable of on-the-fly upsamping as Roon does. Let me know if you (or any other Lumin user) need an Audirvana trial code.
A coworker owns a really popular and highly rated R2R DAC capable of 1.5MHz PCM. However, it also has locking problems at the highest PCM like yours. So I would say it is not uncommon for DAC to have difficulty locking to extreme PCM rates.
Thanks Peter. Could you PM a trial code for Audirvana? Also, steps I would need to take for getting it to find the Lumin. I assume a factory reset to remove the Exclusive Roon mode. Thanks for your help.
Thank you for all the in-depth troubleshooting and additional information here. We’ve shared it with our partners team - certainly let us know if you’re able to test over Audirvana!
So what does this mean? Ayre is claiming its a ‘handoff issue between Roon and the QX-5’, which is why I decided to post here.