Distortion with Ultra line out to B&K power amp

[harkpabst]

Continued here:

https://forum.wiimhome.com/threads/...ortion-since-5-2-715362-firmware-update.7105/

 

[harkpabst]

Since your other thread didn't yield any satisfactory results you could send feedback to WiiM directly through the WiiM Home app: More => Feedback

Your report will also include device logs, which WiiM can use to make sense of the behaviour.

 

[QuarryHunslet]

Both threads have now been merged.

 

[RWB]

Did that include setting the line input resolution to 24 bit 96 kHz (instead of 192 kHz). If not, please make sure to give that a try, too. Measurements have shown worse performance of the ADC at 192 kHz (wether in the audible range or not), but this behaviour could change between firmware versions.


Definitely worth it. Power cycling is completely harmless. You don't loose any settings (in contrast to a factory reset) but sometimes is needed to cure issues that appear after a firmware update.

Last question: Did you happen to apply any form of EQ to the line input?

Power cycle did help but hasn't eliminated the problem completely. CD's with exceptional dynamic range such as Telarc's still have issues on the transients where there's a lot of energy. Still present with line out set to 200Vrms and EQ set to flat. I will try a reset later today.

 

[RWB]

Both threads have now been merged.

Thanks and that makes sense.

 

[Wiimer]

The CD player via line-in was not an issue until the latest firmware update.

This may not be related to your problem, but if you have the latest FW version of Ultra installed, I would recommend reverting the WiiM app back to the previous version (3.2.0) .
Please try reinstalling the WiiM app.

 

[harkpabst]

I will try a reset later today.

Trying 24 bit 96 kHz first would potentially make some sense.