WiiM Ultra Firmware v5.2.812048 - Mar 27, 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.

5.2.812048 (In Progress)​

Release date:

Mar 27, 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.

 

[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.