WiiM Ultra Firmware v5.2.812661 - Apr 2, 2026

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.

5.2.812661 (In Progress)​

Release date:

Apr 2, 2026

Highlights:

1. Sub & Main Speaker Sync: Automatically aligns subwoofer and main speakers for improved timing at the listening position.
2. Per-Input Screen Control: Enable or disable the screen display for each input mode.
3. Headphone EQ: Added independent EQ for headphone output optimization.
4. Standby Source Mode: Automatically switch to a selected input when entering standby, enabling instant playback.
5. Spotify Smart Play: Resume your latest listening session with a single tap.
6. Surround Setup: Simplified setup with full backward compatibility. (requires upcoming app update).

Screen:

1. Playback Screen: Added a vinyl-style playback screen for a more immersive experience.
2. Localization: Added French language support.

Playback & Audio:

1. Playback Latency: Reduced delay when starting playback.
2. EQ: Improved responsiveness when adjusting and switching EQ settings.
3. Line In: Fixed distortion during extended playback sessions.
4. Bass Output: Fixed low bass levels for Apple TV (Dolby 5.1).
5. Audio Sync: Improved sync accuracy at microsecond level for better group playback (requires upcoming app update).

Radio & Streaming Services:

1. TIDAL Connect: Upgraded SDK to resolve unexpected playback interruptions.
2. Soundtrack: Updated SDK for improved playback stability and performance.
3. TuneIn: Fixed playback issues for certain stations and improved resume behavior after long pauses.
4. Deezer: Fixed unexpected playback interruptions.

General Improvements:

1. Wi-Fi: Improved network stability and enhanced compatibility with Wi-Fi 7 routers.
2. HDMI ARC: Disabling automatic audio output now correctly keeps WiiM in standby and defaults to the TV speakers.
3. HTTP Server: Improved concurrency and stability under high load.
4. Audio Input: Fixed playback crash issues.
5. Remote: Fixed occasional disconnection and unexpected max volume issues.
6. Alarm: Fixed incorrect alarm and preset volume behavior.
7. Roon: Fixed occasional crash issues.
8. EQ: Enables EQ for Dolby 5.1 playback.
9. Alarm: Fixes BBC and vTuner alarms defaulting to the chime.
10. Spectrum Display: Improves dynamic visualization.
11. Qobuz Connect: Fixed occasional playback stopping issues.

 

[EddNog]

Silly question... Shouldn't the wifi network latency be considered as an added delay/timing factor to manage also?
And what if network latency changes?
The defined corrective value for the listening point is anyway written within the Ultra's DSP without further need to be checked?

Are you talking about using a WiiM Sub linked over WiFi?

Because WiFi does not affect the sync between speakers attached to the WiiM’s analog or digital outputs, nor does WiFi affect the sync with a sub attached to the subwoofer output. Any DSP that is built into the sub, or that might sit between the WiiM and the speakers/amps can induce additional delay (such as a miniDSP applying DIRAC Live).

-Ed

 

[hipoagumol]

Hello
Anyone had the chance to check how this firmware update works with HDMI? In particular:

Has anyone tested?is HDMI having the options and working as in beta?
I.e If Tv switched on, it won't throw audio towards Ultra unless Ultra has HDMI input selected.
@hgo58 knows what I am talking about
View attachment 35844

 

[Saponetto]

Thanks @EddNog !
That was my doubt.

 

[hipoagumol]

Hello,
I know firmware updates come in waves. Has anyone been able to test this one already? In particular:
-HDMI behavior
-Subwoofer/Speakers sync: external mic instead of wiim's mic

I am having very weird results when using this Subwoofer sync in the previous official Ultra firmware (5.2.899035, feb 28th) and wiim home app 3.5.5. I get sometimes speakers ahead of sub 4ms and sometimes viceversa 4ms too...and even sometimes I get large delay for both and subwoofer ahead by 14ms see screenshots. So I am very interested wether the new firmware makes this feature work more consistently with external mic.

 

[sNc]

I couldn't even run normally this sync when using external DAC and USB connection. It's not working for me from the very beginning.

There are three steps of automatic Subwoofer & Speakers Sync, right?

The first: a short high note from main speakers - indicating the test is gonna to happen in a second.

The second: pink noise from the main speakers + subwoofer making the sound together with speakers - here the subwoofer is playing with proper volume level!

The third: short beep, only from subwoofer - this "beep" is very, very quiet. Almost non-existing, even with very high volume levels on the sub and in the wiim app.

And because of this last step I cannot finish the correction - get an error message. My Wiim Ultra doesn't hear my sub at the end.

I hope it will be fixed