Coax to miniDSP OpenDRC-DA8 which feeds 8-ch amp for 4-way loudspeakers. This does not happen with other digital sources into the miniDSP.
WiiM Ultra Firmware v5.2.637652 - Dec 4, 2024
- Thread starter WiiM Team
- Start date
Hi to all
I tried several times, but nothing to do. Doing the ARC with the Ultra connected via USB to the DAC, when it switches to the measurement of the R channel instead of the Sweep a loud noise is transmitted.
I think I have identified the sound I hear in place of the Sweep. I think it is a White Noise.
I wrote to @WiiM Support let's see what they say. In the meantime I will use Coax instead of USB to do the ARC. With Coax there are no problems
I tried several times, but nothing to do. Doing the ARC with the Ultra connected via USB to the DAC, when it switches to the measurement of the R channel instead of the Sweep a loud noise is transmitted.
I think I have identified the sound I hear in place of the Sweep. I think it is a White Noise.
I wrote to @WiiM Support let's see what they say. In the meantime I will use Coax instead of USB to do the ARC. With Coax there are no problems
Have you tried rebooting the device?
I have tested Radio Paradise, Amazon music, Spotify and Qobuz (Free) and so far I hear no noise on mine.
Very strange...
I tested the USB again and no problem. You too can try a reboot if you haven't already.
Hi @Wiimer
No problem while listening. Both the DAC and the Ultra work great on all streaming services. Qobuz-Tidal-Am-Spotify-
And..yes, I tried a reboot but without success. I don't understand why that defect appears during the measurement and only then.
It's as if something happened in the channel switching
Yes, rebooted.Very strange...
I tested the USB again and no problem. You too can try a reboot if you haven't already.
I've determined that this problem probably originates in the miniDSP unit. Switching tracks with different res caused some problems in the past that I resolved with some workarounds. In this case, I tried fixing the output resolution of the Ultra to 96/24. I know this means upsampling of a lot of files, as well as the occasional downsampling, which may cause some degradation of the signal, but not positive it's so audible.
Anyway, this has stopped the popping for now.
Anyway, this has stopped the popping for now.
Valentino
Member
Grom the sideline: Since my MiniDSP Flex Eight calculates at 96 kHz I’ve set the Ultra output to 24/96. The resampling has to happen somewhere and I decided to have it done on the transmitting side.
Did you fix the output resolution to 24/96 on the Wiim? If so, was it because you got the same popping as I got when switching between files of different resolution?
Valentino
Member
I fix it, yes.
I fixed it because I wanted the ultra to handle all resampling instead of letting the Flex Eight do it. Preemptive? Yes.
I fixed it because I wanted the ultra to handle all resampling instead of letting the Flex Eight do it. Preemptive? Yes.
Last edited:
But why resample if you don't have to? It would be very worthwhile to me if you could let the Wiim output the signals in there native resolution & let it pass through the Flex 8 unchanged. If the "resolution change popping" doesn't happen then we'll know miniDSP has fixed this problem. My OpenDRC DA8 is around 10 yo, so hopefully the Flex does better!
Valentino
Member
The Flex Eight calculates at 96 kHz anyway.
Not really the same thing, afaik. Or is it?? My miniDSP is also processing internally at 24/96.
Valentino
Member
To me it’s almost a philosophical question since I do not have any other means than my ears to decide if there is a precision difference in the Wiim and MiniDSP resampler. I cannot hear any.
I do know that 96 kHz is easier on the optical transmission than 192. I have some of those files.
I do know that 96 kHz is easier on the optical transmission than 192. I have some of those files.
Similar threads
