PEQ and RoomFit bypassed when outputting 5.1 audio

[ajr534]

I'm using a Wiim Ultra, and the PEQ corrections set in both the EQ and RoomFit sections are applied correctly when playing a movie with surround 5.1 audio output disabled. But when I enable 5.1 output, both the EQ and RoomFit corrections are bypassed immediately.

Am I doing something wrong? Is this a bug?

All help much appreciated.

 

[hgo58]

Welcome to the forum. You are not wrong. There are unfortunately currently no EQ available.

See the thread 'Unable to EQ When Dolby Activated' https://forum.wiimhome.com/threads/unable-to-eq-when-dolby-activated.7847/

 

[ajr534]

Welcome to the forum. You are not wrong. There are unfortunately currently no EQ available.

See the thread 'Unable to EQ When Dolby Activated' https://forum.wiimhome.com/threads/unable-to-eq-when-dolby-activated.7847/

Thank you for the super quick response

Fingers crossed for the future and I'll submit feedback to Wiim too.

 

[ajr534]

This problem looks to be fixed now with firmware version 5.2.812048

Happy days!

 

[harkpabst]

This problem looks to be fixed now with firmware version 5.2.812048

That's a surprise because it's not mentioned in the firmware release notes.

Are you sure that you can apply EQ freely as you like? There is a documented improvement mentioned regarding Apple TV and low bass level.

 

[ajr534]

That's a surprise because it's not mentioned in the firmware release notes.

Are you sure that you can apply EQ freely as you like? There is a documented improvement mentioned regarding Apple TV and low bass level.

100% sure. To test, I put in a HP filter at 500Hz so that the audible difference would be dramatic and not subject to placebo type thinking. The filter's effect is unmistakeable and it works both when the WiiM is decoding 5.1 DD and when it is not.

It also works as part of RoomFit.

You are right that this is not documented in the release notes - I don't know why.

And I don't have Apple TV - so it isn't related to that.

Are you in a position to also test at your end?

 

[harkpabst]

Are you in a position to also test at your end?

No, unfortunately not right now. Maybe this weekend, but I only have a simple pair of stereo speakers in my Ultra setup, so 5.1 support is hardly useful for me.

Maybe I can try it out just for the purpose of testing.

This would make this firmware release even more remarkable.

 

[mpr]

Seriously! I am waiting for the firmware, but will be able to test once it lands.

 

[harkpabst]

100% sure. To test, I put in a HP filter at 500Hz so that the audible difference would be dramatic and not subject to placebo type thinking. The filter's effect is unmistakeable and it works both when the WiiM is decoding 5.1 DD and when it is not.

It also works as part of RoomFit.

You are right that this is not documented in the release notes - I don't know why.

And I don't have Apple TV - so it isn't related to that.

Are you in a position to also test at your end?

WiiM have updated the release notes and confirmed what you already found as a "general improvement".

Thread 'WiiM Ultra Firmware v5.2.813259 - Apr 8, 2026'

Mar 28, 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.

5.2.813259 (In Progress)​

Release date:

Apr 8, 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...

• WiiM Team
• Replies: 136
• Forum: WiiM Ultra Firmware Updates

• 

I guess they could have also filed this under highlights for quite a number of users.