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.

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Grazie!