WiiM Ultra Firmware v5.2.717053 - May 15, 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.

5.2.717053 (In Progress)​

Release date:

5 / 15 / 2025

What's New:

1. New Radio Widget: Quickly select and play a radio station directly from the screen.
2. Audio Input Management: Choose which audio inputs to display and switch between them easily.
3. Improved Group Playback Sync: Fixed synchronization issues that occurred after applying subwoofer and main speaker delay calibration.
4. Enhanced DSD Playback: Resolved stuttering during multi-channel DSD file playback for smoother high-res listening.
5. Group Mute/Unmute via Master Device: Instantly mute or unmute the entire speaker group directly from the master device for seamless group control.
6. Device Discovery Enhancements: Improved stability and connectivity for WiiM Home, Spotify and TIDAL apps.
7. Knob Volume Step: Adjust the volume step when rotating the knob (requires the upcoming app update).

Bug Fixes:

1. A/V Sync Optimization: Enhanced audio/video synchronization for HDMI ARC to improve lip-sync accuracy.
2. Plex Playback Fix: Resolved playback failure when Secure Connections is set to "Required".
3. Standby Mode Fix: Resolved an issue preventing the device from entering standby mode when in follower mode.
4. TIDAL Connect Fix: Addressed the issue of track skipping delay and corrected track duration when using the HTTP API.
5. General Performance: Stability improvements and behind-the-scenes optimizations.

 

[fpentaris]

Have you tried a power cycle instead of a reboot? Remove the power supply for a min or two then try again.

I also have instability on the selected inputs. Wiim switches to Dlna when I have selected optical in. I am still troubleshooting. I see this behaviour when I start with DLNA casting from my android app using the symfonium app. I stop Dlna casting using symfonium and switch to optical in using wiim home app. Sometimes the device switches back to Dlna and symfonium displays the normal media playing screen even though I did not touch symfonium. So it could be a bug with symfonium, or with wiim home or with the device firmware. If I manage to pin point the offender, I will open a bug (to symfonium or wiim team).

 

[erictheperic]

It potentially can, if you use too much positive pre-gain, which could result in digital clipping. If you wan to be on the safe side, use negative pre-gain for loud sources, only.

In practice, this might mean giving up some SNR for no reason, though. The HDMI ARC input signal is often clearly below 0 dBFS (the maximum digital level). So, if your TV volume is always way lower than e.g. your streaming services, no matter what source is connected to the TV, then there's nothing wrong with applying some positive gain, maybe 3 to 6 dB.

The analogue input is another candidate. If you connect the analogue output of a CD playerto the RCA in, the level might be on par with your streaming sources. But if you connect a phono pre-amp or a turntable with a built-in pre-amp or a tuner or a tapedeck, then the input might be very quiet in comparison. If you add some positive gain here, you might elevate the noise floor a tiny bit (for this single, already inherently noisy analogue source). But if you reduce the pre-gain for your digital streaming sources instead, you're giving up dynamic range of this (close to) perfect source just to end up with equal levels.

TL;DR
Don't shy away from adding 3 to 6 dB of positive pre-gain to HDMI and analogue in. Reduce pre-gain to negative values for other sources until you get a good level matching.

Thank you, kind Sir.