Audio interruption problem WiiM Ultra (Beta) and Rotel A14MKII in 32-bit

[Graziano Grotto]

Hello everyone, I'm testing the latest Beta version on my WiiM Ultra connected via USB to a Rotel A14 MKII amplifier.

I encountered a problem: if you set the USB output to 32-bit, the audio stops completely after about half an hour of listening. The Rotel display shows "Tone Disabled", which indicates the loss of digital signal, although the WiiM app seems to continue to play the song.

If, on the other hand, I set the 24-bit output, everything works perfectly and there are no interruptions. It looks like a 32-bit synchronisation bug. Has anyone else had the same problem with external DACs or Rotel?

 

[SKApretto71]

For the non English speakers, the post relate to a possible issue when using Rotel A14 mkII via USB with Ultra.

If set 32bit, sound stops after about one hour while if set to 24bit it just works.

Anyone else with same issue, using Rocket or any other integrated amp via USB? The user is using 'latest' beta firmware.

 

[SKApretto71]

On my side, I'm not using USB as it seems to not properly work with my DAC and therefore rely on Optical. But the issue - related to 12v trigger - is different and when using 32bit I had never an issue

Just be aware that Ultra is 24bit anyhow, even using 32bit it uses a padding to translate to 32bit but is not able to handle full 32bit signals. As per specs of the product.

 

[Graziano Grotto]

Da parte mia, non utilizzo l'USB perché sembra non funzionare correttamente con il mio DAC e quindi mi affido all'uscita ottica. Ma il problema, relativo al trigger a 12V, è diverso e quando utilizzavo la versione a 32 bit non ho mai avuto problemi.

Tenete presente che Ultra è comunque a 24 bit, anche usando 32 bit usa un padding per convertire a 32 bit ma non è in grado di gestire segnali a 32 bit completi. Come da specifiche del prodotto.

View attachment 36492

Thank you!

 

[BMeek]

Hello everyone, I'm testing the latest Beta version on my WiiM Ultra connected via USB to a Rotel A14 MKII amplifier.

I encountered a problem: if you set the USB output to 32-bit, the audio stops completely after about half an hour of listening. The Rotel display shows "Tone Disabled", which indicates the loss of digital signal, although the WiiM app seems to continue to play the song.

If, on the other hand, I set the 24-bit output, everything works perfectly and there are no interruptions. It looks like a 32-bit synchronisation bug. Has anyone else had the same problem with external DACs or Rotel?

I saw your post and it made me wonder if setting the WiiM Ultra's USB output to my [modern standalone] Fosi ZD3 DAC to the fixed maximum might actually help my HDMI input-related hiccups (periodic HDMI audio drop-outs - theorizing these were caused by the ATV4K shifting sample rates). These issues appear to have stopped now by using the fixed maximum upsample to USB!

For what it's worth, I've been running the 192kHz/32-bit stream from the Ultra to the Fosi DAC and it's been working well for hours now. Best of luck with your Rotel connection!

 

[Graziano Grotto]

I saw your post and it made me wonder if setting the WiiM Ultra's USB output to my [modern standalone] Fosi ZD3 DAC to the fixed maximum might actually help my HDMI input-related hiccups (periodic HDMI audio drop-outs - theorizing these were caused by the ATV4K shifting sample rates). These issues appear to have stopped now by using the fixed maximum upsample to USB!

For what it's worth, I've been running the 192kHz/32-bit stream from the Ultra to the Fosi DAC and it's been working well for hours now. Best of luck with your Rotel connection!

Thank you

 

[Graziano Grotto]

Ho visto il tuo post e mi ha fatto pensare se impostare l'uscita USB della Wii M Ultra sul mio DAC Fosi ZD3 [moderno e autonomo] al valore massimo fisso potesse effettivamente risolvere i miei problemi con l'ingresso HDMI (interruzioni periodiche dell'audio HDMI - ipotizzando che fossero causate dalla variazione della frequenza di campionamento dell'Apple TV 4K). Questi problemi sembrano essersi risolti ora che utilizzo l'upsampling al valore massimo fisso per l'uscita USB!

Per quel che vale, ho trasmesso lo streaming a 192 kHz/32 bit dall'Ultra al DAC Fosi e funziona bene da ore. In bocca al lupo con la tua connessione Rotel!

From tonight I'll try again, it will be my concern to let you know if the wheel is still in protection.

 

[Graziano Grotto]

Success with the latest firmware: 32-bit/192 kHz stability reached!

Hello everyone I wanted to share with you a small but significant step forward that I found after the last firmware update.

Since last night I have been intensively testing the 32Bit 192 kHz configuration and, with great pleasure, I can confirm that the system has finally become solid. No more sudden interruptions and, above all, the amplifier no longer went into protection, which used to happen systematically.

I have done several tests also by connecting the TV (which clearly sends a standard 16-bit/44.1 kHz signal) and the transition between sources or bit depth management now seems smooth and smooth.

It seems that the Wiim team has taken another nice step in the right direction. It's great to see when user feedback transforms and concrete improvements that allow us to enjoy our music without "display anxiety"!

We know very well that we will never listen to 32-bit recorded music. The news is that now the machine can handle this load of data without difficulty.

 

[huw]

by connecting the TV (which clearly sends a standard 16-bit/44.1 kHz signal)

That's interesting. I thought most TV audio output was 48 kHz.

 

[Graziano Grotto]

Mu bad, everyone! That was a Total typo on mu end. You're absolutely right, the TV outputs at 48 kHz, not 44.1 I Guess l had CD mode on the brain while typing. Thanks for catching that!

 

[huw]

No worries! It's a common complaint when using streaming services apps running on TVs that everything gets resampled to 48 kHz.