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.

 

[Machiavelli]

saw the led flashing. after opening the app this childish rocket appeared. what is new and i could start immediately. so accomplished fact. but no problem. as long as qobuz works it is all good.

 

[reniro]

I got it too ... sadly the covers in the usb media library still looks pixelated. Doesn't matter which resolution I upload.
Edit: only in the smaller cover view - when full screen it looks fine now. Must be something with the scaling ... but for sure not that important.

 

[hgo58]

@hgo58 do you also feel the 0dB full-scale approaching?

Unfortunately the VU meter is still a power amplifier meter and although it may be more precise (whatever that mean here?) I cannot see where the 0 dBFS is (digital clipping).

 

[Saponetto]

@hgo58 Just got this update too... meh
Well, at least that absurd, weird needle randomly bumping-to-full-scale when turning the volume knob went away.

 

[Machiavelli]

is it normal that after a firmware updates all services in the browser section are set to active? no big deal. but wasting at least five seconds of life time

 

[Saponetto]

@Machiavelli Just checked.
My device still shows what was enabled before the update.
Almost curious.

 

[hgo58]

is it normal that after a firmware updates all services in the browser section are set to active? no big deal. but wasting at least five seconds of life time

No, that should not happen unless it was a factory reset.

Mine updated without changing any configurations.

 

[Machiavelli]

 

[hgo58]

I would take either option right now as it is a lot of clicks to change it every time.

You can also slide the VU meter in on the Ultra screen.

 

[hgo58]

@hgo58 do you also feel the 0dB full-scale approaching?

Interestingly the VU meter scale changes between the input (original ) signal and the output signal.

This is input (-25 to +3 dB):


And this is output (-60 to +10 dB):


Why? It makes no sense to me.

 

[Saponetto]

Yep.
Quite curious, especially for the -60dB of the output readout.
Maybe they're planning an use for an "adaptive readout depending on input dynamics"?

 

[azoriusmage]

You can also slide the VU meter in on the Ultra screen.

In which case I don't get the playback screen I want when artwork is supplied

 

[azoriusmage]

Looks like it, but there's still a few things on the roadmap, including Plex.

Ah the mythical roadmap seems like a long time since we saw one.

 

[hgo58]

In which case I don't get the playback screen I want when artwork is supplied

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

 

[DariuszP]

Interestingly the VU meter scale changes between the input (original ) signal and the output signal.

This is input (-25 to +3 dB):
View attachment 27484

And this is output (-60 to +10 dB):
View attachment 27485

Why? It makes no sense to me.

I guess that this is what was clearly requested by many - while scale of -25 to +3 is perfectly fine for input source (and offers quite nice display "dynamics"), for output volume it led to the situation that when the signal was attenuated to say 50% the needle did not move at all (as it was sort of "below" -25). I think it is ok now?

 

[hgo58]

I guess that this is what was clearly requested by many - while scale of -25 to +3 is perfectly fine for input source (and offers quite nice display "dynamics"), for output volume it led to the situation that when the signal was attenuated to say 50% the needle did not move at all (as it was sort of "below" -25). I think it is ok now?

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.

 

[DariuszP]

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.

No idea - I just use it to see (from afar) if something is playing (or not). And its look is quite pleasing to me - brings some life to the display. So it works perfectly fine for me, however I fully understand that it might not be sufficient for more serious use.

 

[pjorgenunes]

Although 0dBFS really should be max value, there should be an indicator (a red led on a screen corner) that would light (and maybe some small delay before turn of again). This can happen due to inter-sample peaks, caused by digitally sampled points that can become higher than the sampled peak during digital-to-analog conversion, causing distortion, or even the use of +dB on PEQ / RoomFit.
For the Output Signal this would be awesome to become aware if some signal processing or the music files themselves are causing distortion.
In my case is not that probable since all my files have ReplayGain applied according to EBU R128 and with True Peak Scan enabled. This gives a good headroom to avoid clipping, but... one never knows.

 

[hgo58]

No idea - I just use it to see (from afar) if something is playing (or not). And its look is quite pleasing to me - brings some life to the display. So it works perfectly fine for me, however I fully understand that it might not be sufficient for more serious use.

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).

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

 

[canard]

Although 0dBFS really should be max value, there should be an indicator (a red led on a screen corner) that would light (and maybe some small delay before turn of again). This can happen due to inter-sample peaks, caused by digitally sampled points that can become higher than the sampled peak during digital-to-analog conversion, causing distortion, or even the use of +dB on PEQ / RoomFit.
For the Output Signal this would be awesome to become aware if some signal processing or the music files themselves are causing distortion.
In my case is not that probable since all my files have ReplayGain applied according to EBU R128 and with True Peak Scan enabled. This gives a good headroom to avoid clipping, but... one never knows.

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