WiiM Ultra Firmware v5.2.730566 Update - Sep 26, 2025

Please review the WiiM Ultra update release notes below. If you encounter any issues, feel free to reach out to us. This firmware update is being rolled out in stages, with devices updating sequentially over the next few days.

5.2.730566 (In Progress)​

Release date:

9 / 26 / 2025

What's New:

1. Smarter VU Meter – More accurate readout of your output levels.
2. Amazon Music – Faster resume after long pauses and improved casting stability from the Amazon Music app.

Bug Fixes:

1. Dolby Audio – Eliminated playback noise and fixed subwoofer no-sound cases.
2. USB Library – Refined image resizing for crisper album art.
3. Pandora – Resolved track skipping after resume and login failures.
4. Alarms – Station-based alarms now trigger reliably.
5. TuneIn – Apple Music radio via TuneIn now resumes after long pauses; reduced radio playback failures.
6. LMS – Correct bitrate display for radio streams.
7. KKBOX – Fixed playback interruptions and corrected bitrate reporting.
8. General – Stability, performance, and other minor fixes.

 

[hgo58]

Air Dancer Stickers - Find & Share on GIPHY

GIPHY animates your world. Find Air Dancer Stickers and Transparent GIFs that make your conversations more positive, more expressive, and more you.

giphy.com

the needle is fine..for your use this can be more explicit...
;-)))

No idea what you are trying to say, sorry.

 

[canard]

That is fine. I'm just expecting a little more than a toy. Especially because it is easy to do.

WiiM could keep the graphic and just define the scale to match dBFS with the 0 dBFS at the current +10 (+3).

View attachment 27496

https://al-ba.com/wp2/understanding-digital-audio-levels-2/

It's essentially a persistent "overload" that could be useful, even in true peak mode to be serious... especially since it could perhaps be returned to Wiim Home for those who don't have the Ultra and its screen...

 

[azoriusmage]

That was a comment to the multiple clicks. You can slide between the VU meter and the artwork pages.

Not if you want to see full screen artwork

 

[pjorgenunes]

Air Dancer Stickers - Find & Share on GIPHY

GIPHY animates your world. Find Air Dancer Stickers and Transparent GIFs that make your conversations more positive, more expressive, and more you.

giphy.com

the needle is fine..for your use this can be more explicit...
;-)))

If the needle goes above the 0dbfs max as an indication of clipping that's fine for me

Although this arm up at the exact moment...

 

[canard]

No idea what you are trying to say, sorry.

if for just an animation if in reading, this kind of thing even more explicit than vu meter and very small needle ;-))))
(Sorry for this...
Post in thread 'WiiM Ultra Firmware v5.2.730566 Update - Sep 26, 2025' https://forum.wiimhome.com/threads/...-2-730566-update-sep-26-2025.8188/post-149694)
)

I had proposed without great success, a long time ago, an animated disco ball.

 

[hgo58]

If the needle goes above the 0dbfs max as an indication of clipping that's fine for me

It cannot go above 0 dBFS per definition. If the value is going near the 0 dBFS, it's a indication of potential clipping.

For the current VU meter I have no indication of what the max value is.
Looks like being around 0 dB for original signal and above +10 dB for output?

 

[jajs]

@WiiM Team please please please give us a 3rd "Large Cover" playback screen option with plain black sides. And an option to set the playback screen style on a per input basis would be much appreciated as well! For example allowing it to always show the VU meter for phono/line input, but show static info for streaming, HDMI etc.

P

Post in thread 'Feedback Needed! WiiM Ultra Screen Enhancements'

Apr 12, 2025

A consistent look and feel would however be nice.

This!

I've requested this numerous times before (through the app and on the forum), but we need the option for a plain black background in the full-screen artwork playback view.

Another improvement would be a way to choose which visualisation you see on a per input basis. For example: when streaming always show artwork. When listening to one of the analog/digital inputs: always show VU meter. When listening through HDMI ARC: show the static icon for the least amount of distraction.

And could you please do something about the...

• pieterv1

• 

I agree! We want to be able to assign a different screen style depending on the input, so we don’t have to switch it manually every time,for example, VU meter for different inputs or different cover art style for streaming...

 

[Saponetto]

Sorry to inform that the odd jumps of the needle still persist when using "Original Signal" mode.
In partial compensation, ( ) in absence of signal the needle now pleasantly sits to -zero deflection- when using "Output Amplitude" mode.

 

[azoriusmage]

I agree! We want to be able to assign a different screen style depending on the input, so we don’t have to switch it manually every time,for example, VU meter for different inputs or different cover art style for streaming...

Yes and as a minimum a preferred one with track info where available falling back to Vu or other one of your choice where no track info is available. The default screens for line in etc are incredibly dull. This isn't even a huge piece of logic.

 

[jajs]

Sorry to inform that the odd jumps of the needle still persist when using "Original Signal" mode.
In partial compensation, ( ) in absence of signal the needle now pleasantly sits to -zero deflection- when using "Output Amplitude" mode.

View attachment 27505

I would say it’s worse than before

 

[Saponetto]

The problem is they seems not to have a clear path on what to get from their VU-meter implementation.
Pursuing hints and suggestion is not a good approach, imho.
Do simple things, take your time and do these well.

 

[jajs]

The problem is they seems not to have a clear path on what to get from their VU-meter implementation.
Pursuing hints and suggestion is not a good approach, imho.
Do simple things, take your time and do these well.

I also always keep the original signal on, the problem is that when you switch to the output signal it sounds much smoother and more "real".

 

[Saponetto]

No. it's just an induced bias.
It's due the unrequested silence and the subsequent level jump that is perceived between the VU modes.

 

[jajs]

No. it's just an induced bias.
It's due the unrequested silence and the subsequent level jump that is perceived between the VU modes.

Sorry, I didn’t mean to say that it sounds better, but rather that the signal reproduced by the VU is smoother.

 

[Angel]

And where is the max signal value (0 dBFS) then?
0 dB, +3 dB or +10 dB?

I cannot use those scales for anything. It's just a needle moving.

I have tested with many reference signals: Meter 0dB at the WiiM is 0dBFS of the input and output DAC.
You can test it easly for yourself, by streaming digitally a loudness maximized techno trance track hitting constantly near 0dBFS of the input meter, or a 0dBFS sine from a laptop with optical out connected to the optical in of the WiiM.

The meters are right after input ADC and right before output DAC, on the digital side.
As the input ADC can't output more than 0dBFS, or digital streams are limited inherently to 0dBFS, positive dB values of the input meter don't really make sense. The red +3dB are akin artists' impression.

However, with applying internal input gain (after the input meter), or EQ or RoomFit with positive gain, and setting a fixed output volume to 100%, you can easily go above 0dBFS. dBFS relative to the output DAC, but not limited by internal number format with lots of more dynamic than the output DAC. This does not cause distortion, internally, but of course it will if positive dBFS peaks go finally to the DAC.
There might be some internal compressor or limiter for peaks with positive 0dBFS to avoid nasty digital clipping, but that can not do any black magic and will alter the sound in some way.

This has to be avoided by lowering the output volume in %, so that the output meter doesn't exceed 0dBFS. That's the purpose of the output meter.

Well done, WiiM!

 

[Angel]

https://al-ba.com/wp2/understanding-digital-audio-levels-2/

As already discussed in length, association of analog dB levels (relative to some definition) to digital dBFS is a matter of definition, many standards exist.
At the WiiM Ultra everybody can decide for himself in the audio settings if 0dBFS of the output DAC should be 2V RMS or 1V RMS or 0.5 RMS ... with respective completely different dBVU values for 0dBFS = 0dB meter reading, and different from you diagram, if you might like to calculate for yourself.

 

[Saponetto]

Sorry, I didn’t mean to say that it sounds better, but rather that the signal reproduced by the VU is smoother.

Oh, now I understood!
And I have to say you are right, it seems to be a -noticeably- different decay applied to the needles visualizations.
What is its purpose and what correlation it has on the different VU scales is actually a deep mistery, at least for me.

 

[canard]

I have tested with many reference signals: Meter 0dB at the WiiM is 0dBFS of the input and output DAC.
You can test it easly for yourself, by streaming digitally a loudness maximized techno trance track hitting constantly near 0dBFS of the input meter, or a 0dBFS sine from a laptop with optical out connected to the optical in of the WiiM.

The meters are right after input ADC and right before output DAC, on the digital side.
As the input ADC can't output more than 0dBFS, or digital streams are limited inherently to 0dBFS, positive dB values of the input meter don't really make sense. The red +3dB are akin artists' impression.

However, with applying internal input gain (after the input meter), or EQ or RoomFit with positive gain, and setting a fixed output volume to 100%, you can easily go above 0dBFS. dBFS relative to the output DAC, but not limited by internal number format with lots of more dynamic than the output DAC. This does not cause distortion, internally, but of course it will if positive dBFS peaks go finally to the DAC.
There might be some internal compressor or limiter for peaks with positive 0dBFS to avoid nasty digital clipping, but that can not do any black magic and will alter the sound in some way.

This has to be avoided by lowering the output volume in %, so that the output meter doesn't exceed 0dBFS. That's the purpose of the output meter.

Well done, WiiM!

It's a little more complicated.....

Thread 'Important subject...about dac level etc etc' https://forum.wiimhome.com/threads/important-subject-about-dac-level-etc-etc.8166/....

(It's a true peak overload that could be welcome... ;-) )

 

[hgo58]

I have tested with many reference signals: Meter 0dB at the WiiM is 0dBFS of the input and output DAC.
You can test it easly for yourself, by streaming digitally a loudness maximized techno trance track hitting constantly near 0dBFS of the input meter, or a 0dBFS sine from a laptop with optical out connected to the optical in of the WiiM.

The meters are right after input ADC and right before output DAC, on the digital side.
As the input ADC can't output more than 0dBFS, or digital streams are limited inherently to 0dBFS, positive dB values of the input meter don't really make sense. The red +3dB are akin artists' impression.

However, with applying internal input gain (after the input meter), or EQ or RoomFit with positive gain, and setting a fixed output volume to 100%, you can easily go above 0dBFS. dBFS relative to the output DAC, but not limited by internal number format with lots of more dynamic than the output DAC. This does not cause distortion, internally, but of course it will if positive dBFS peaks go finally to the DAC.
There might be some internal compressor or limiter for peaks with positive 0dBFS to avoid nasty digital clipping, but that can not do any black magic and will alter the sound in some way.

This has to be avoided by lowering the output volume in %, so that the output meter doesn't exceed 0dBFS. That's the purpose of the output meter.

Well done, WiiM!

That doesn't make any sense and you are mixing up dB and dBFS.

Digital audio levels are measured differently than analog audio levels. Audio levels in digital are measured in dBFS (decibels relative to full scale).

0 dBFS represents the highest possible level in digital equipment. All other measurements expressed in terms of dBFS will always be less than 0 dB (negative numbers). 0 dBFS indicates the digital word (representing the analog waveform) with all digits =”1″, the highest possible sample.

The lowest possible sample is (16 bit audio):
0000 0000 0000 0001, which equals -96 dBFS.

So the VU meter scale shall be logarithmic between -96 dBFS and 0 dBFS!

The output of the DAC is not relevant here, as the meter don't measure the analog output.