WiiM Ultra

[Joffy1780]

I ran some measurements earlier to see the effects of Wiim's automated room correction. Wiim are about to start beta testing room correction which corrects both channels independently, so the results should be even better when they do, hopefully.
The results are from two separate 'correction' sessions - the first using the mics in an Oppo Find X5 Pro and an iPhone 14 and the second using a Umik-1 (sans calibration file) connected to my Oppo phone. In the first session I limited the correction to between 45-4kHz for Android and between 45-2kHz for iOS. The second session with the Umik-1 was limited to 20-700hz. In both session I limited max boost to 6dB and left max Q set at 10.
I'll let you all decide for yourselves whether you think it is effective.

Second session results below - room correction using UMIK-1 connected to Oppo Find X5 Pro.

Left channel:

Purple trace is uncorrected, green is corrected to B+K curve and orange is corrected to 'flat'.

Right Channel:

Purple trace is uncorrected, green is corrected to B+K and orange is flat.

Left and Right:

Purple trace is uncorrected, green is corrected to B+K and orange corrected to flat.

First session (Phone mic).

Left channel:

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

Right channel:

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

Left and Right:

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

System chain - Laptop running REW connected to Wiim Pro via HDMI>Optical extractor. Wiim Pro is connected to SMSL DO100 via optical, which feeds an Audiophonics MPA-S125NC via RCA (driving a pair of KEF Q4) and a BK Double Gem subwoofer via XLR>RCA cable. There is no bass management in play, other than the low pass filter on the BK sub.
Can share .mdat files if anyone is interested.

Hope this helps anyone wondering whether the Wiim room correction is just a throw away gimmick or an effective tool.

 

[staticV3]

I ran some measurements earlier to see the effects of Wiim's automated room correction. Wiim are about to start beta testing room correction which corrects both channels independently, so the results should be even better when they do, hopefully.
The results are from two separate 'correction' sessions - the first using the mics in an Oppo Find X5 Pro and an iPhone 14 and the second using a Umik-1 (sans calibration file) connected to my Oppo phone. In the first session I limited the correction to between 45-4kHz for Android and between 45-2kHz for iOS. The second session with the Umik-1 was limited to 20-700hz. In both session I limited max boost to 6dB and left max Q set at 10.
I'll let you all decide for yourselves whether you think it is effective.

Second session results below - room correction using UMIK-1 connected to Oppo Find X5 Pro.

Left channel:

View attachment 391836

Purple trace is uncorrected, green is corrected to B+K curve and orange is corrected to 'flat'.

Right Channel:
View attachment 391837

Purple trace is uncorrected, green is corrected to B+K and orange is flat.

Left and Right:
View attachment 391846
Purple trace is uncorrected, green is corrected to B+K and orange corrected to flat.

First session (Phone mic).

Left channel:

View attachment 391844

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

Right channel:

View attachment 391845


Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

Left and Right:
View attachment 391847

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

System chain - Laptop running REW connected to Wiim Pro via HDMI>Optical extractor. Wiim Pro is connected to SMSL DO100 via optical, which feeds an Audiophonics MPA-S125NC via RCA (driving a pair of KEF Q4) and a BK Double Gem subwoofer via XLR>RCA cable. There is no bass management in play, other than the low pass filter on the BK sub.
Can share .mdat files if anyone is interested.

Hope this helps anyone wondering whether the Wiim room correction is just a throw away gimmick or an effective tool.

None of your graphs load currently.

You cannot drag images directly into the text box.

You need to use either the "Attach files" button below, or the Image attach button on top.

Edit: fixed

 

[Joffy1780]

None of your graphs load currently.

You cannot drag images directly into the text box.

You need to use either the "Attach files" button below, or the Image attach button on top.

Sorry, I was editing and lost the images, should be OK now.

 

[staticV3]

Sorry, I was editing and lost the images, should be OK now.

Yup, they show up now

One tip: check your axis limits before taking the screenshots.

An x-axis from 3Hz to 1650Hz will cut off most of the data.

Similarly, a y-axis from 0 to 110dB will majorly compress what little data there is, making it even harder to read.

40-90dB SPL, 10Hz to 20kHz would be sensible values.

 

[Joffy1780]

Yup, they show up now

One tip: check your axis limits before taking the screenshots.

An x-axis from 3Hz to 1650Hz will cut off most of the data.

Similarly, a y-axis from 0 to 110dB will majorly compress what little data there is, making it even harder to read.

What axis limits would you suggest and I'll redo?

 

[staticV3]

What axis limits would you suggest and I'll redo?

40-90dB SPL, 10Hz to 20kHz would make sense.

 

[Joffy1780]

Filters applied by Wiim;
UMIK measured corrected to B+K curve



UMIK measured corrected to flat



Android measured corrected to flat


iOS measured corrected to flat

 

[Soniclife]

So its recommended to use the Wiim variable volume and just set a fixed volume on the amp?

At the moment i have the Wiim fixed at 100% and just control the volume on the amp.

Im kinda nervous maxing out the volume on the amp and relying on the Wiim to not reset to 100% and blow everything up

I don't see why one way is recommended over the other, use whatever works for you. If your amp has a volume control that's always in the circuit, most are, then I'd use it personally.

 

[Rednaxela]

For REW graphs I recommend exporting using the Capture button:

Then choose 50dB/decade here:

This will standardize the graph’s proportions and make them visually comparable regardless of the chosen axis limits.

 

[staticV3]

For REW graphs I recommend exporting using the Capture button:

View attachment 391881


Then choose 50dB/decade here:

View attachment 391882

This will standardize the graph’s proportions and make them visually comparable regardless of the chosen axis limits.

50dB/dec is really quite stretched:


Also doesn't fix poorly chosen axis limits:

 

[Rednaxela]

50dB/dec is really quite stretched:
View attachment 391884

Perhaps. On the other hand it's the most flattering ratio specified by the standard the functionality was based on.

Also doesn't fix poorly chosen axis limits:
View attachment 391885

Agree but it does make the actual issue visible.

 

[Joffy1780]

Perhaps. On the other hand it's the most flattering ratio specified by the standard the functionality was based on.


Agree but it does make the actual issue visible.

50dB/dec is really quite stretched:
View attachment 391884

Also doesn't fix poorly chosen axis limits:
View attachment 391885

Updated the graphs, guys. Thanks for the help!!

 

[Emiyanez]

I ran some measurements earlier to see the effects of Wiim's automated room correction. Wiim are about to start beta testing room correction which corrects both channels independently, so the results should be even better when they do, hopefully.
The results are from two separate 'correction' sessions - the first using the mics in an Oppo Find X5 Pro and an iPhone 14 and the second using a Umik-1 (sans calibration file) connected to my Oppo phone. In the first session I limited the correction to between 45-4kHz for Android and between 45-2kHz for iOS. The second session with the Umik-1 was limited to 20-700hz. In both session I limited max boost to 6dB and left max Q set at 10.
I'll let you all decide for yourselves whether you think it is effective.

Second session results below - room correction using UMIK-1 connected to Oppo Find X5 Pro.

Left channel:

View attachment 391914

Purple trace is uncorrected, green is corrected to B+K curve and orange is corrected to 'flat'.

Right Channel:

View attachment 391915
Purple trace is uncorrected, green is corrected to B+K and orange is flat.

Left and Right:

View attachment 391916
Purple trace is uncorrected, green is corrected to B+K and orange corrected to flat.

First session (Phone mic).

Left channel:

View attachment 391917

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

Right channel:

View attachment 391918


Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

Left and Right:

View attachment 391919

Purple is uncorrected, green is corrected to flat using Oppo internal microphone and orange is corrected to flat using iPhone 14 internal Mic.

System chain - Laptop running REW connected to Wiim Pro via HDMI>Optical extractor. Wiim Pro is connected to SMSL DO100 via optical, which feeds an Audiophonics MPA-S125NC via RCA (driving a pair of KEF Q4) and a BK Double Gem subwoofer via XLR>RCA cable. There is no bass management in play, other than the low pass filter on the BK sub.
Can share .mdat files if anyone is interested.

Hope this helps anyone wondering whether the Wiim room correction is just a throw away gimmick or an effective tool.

Really useful data @Joffy1780 ! I did a similar experiment in my system and I got similar results. It took me a couple of tries to get the parameters right in the WiiM app but, at the end, the measurements in REW confirmed that WiiM RC was doing what it was supposed to do.

I guess you are aware but I would not correct to such high frequencies. I would focus on room modes from 45 to maybe 200-300 Hz. Above that, I would rather use anechoic measurements for your speakers if available.

Currently, I am using 7 PEQ filters in WiiM to adjust frequency response above above 300Hz based on measurement in Spinorama and 3 PEQ filters to correct for room modes in the lower frequencies using REW instead of WiiM for room correction.

 

[Joffy1780]

Really useful data @Joffy1780 ! I did a similar experiment in my system and I got similar results. It took me a couple of tries to get the parameters right in the WiiM app but, at the end, the measurements in REW confirmed that WiiM RC was doing what it was supposed to do.

I guess you are aware but I would not correct to such high frequencies. I would focus on room modes from 45 to maybe 200-300 Hz. Above that, I would rather use anechoic measurements for your speakers if available.

Currently, I am using 7 PEQ filters in WiiM to adjust frequency response above above 300Hz based on measurement in Spinorama and 3 PEQ filters to correct for room modes in the lower frequencies using REW instead of WiiM for room correction.

Thank you. I'm using the the B and K corrected filters at the minute, and that was limited to 700Hz.
The independent channel EQ is already in beta (I'm a bit late and have just requested the firmware) so I'll be running it again once I get that.
I feel it has definitely improved the bass, though, which is what most people are after.

 

[ehabheikal]

Is it possible to have room correction and normal equalizer at the same time?

 

[Joffy1780]

Is it possible to have room correction and normal equalizer at the same time?

No, I'm afraid not.

 

[mlsstl]

Is it possible to have room correction and normal equalizer at the same time?

No, but note that you can play around all you want with the RC settings. As long as you don't save the new settings over the existing file name setting, you'll be able to return to the original setting. I've actually setup up a couple of different RC profiles ("drapes open" vs "drapes closed" vs "sibilant recording", etc.) that allows me to quickly change the EQ profile based on the situation at hand.

 

[Emiyanez]

Is it possible to have room correction and normal equalizer at the same time?

Not at the moment. If @WiiM Team allowed to select the number of PEQ filters used in RC, one could use the rest of the filters available for other corrections (e.g. adjustments in the higher frequencies).

This is why I am using REW for RC at the moment. I can correct for room modes selecting the number of PEQ filters I would like to use in REW, leaving the rest of the filters for frequency adjustments based on anechoic measurements.

If I am not mistaken, there were also plans to give the possibility of combining PEQ with standard graphic EQ presets in the WiiM App. This could be useful if one corrects for the room and tweaks the speakers but want to apply a "loudness-like" automatic filter to listen at low levels at night.

 

[Cool Runnings]

Just got my Ultra and using Mini optical in for AirPlay. Very happy with this set up for my office very near field listening.

Not sure if upgrading the Kali LP UNFs to Neumann KH80 or Genelec 8030/8020 will make much of a difference. I am using a REL TZeroIII subwoofer with this set up.

Any thoughts?

 

[ehabheikal]

Not at the moment. If @WiiM Team allowed to select the number of PEQ filters used in RC, one could use the rest of the filters available for other corrections (e.g. adjustments in the higher frequencies).

This is why I am using REW for RC at the moment. I can correct for room modes selecting the number of PEQ filters I would like to use in REW, leaving the rest of the filters for frequency adjustments based on anechoic measurements.

If I am not mistaken, there were also plans to give the possibility of combining PEQ with standard graphic EQ presets in the WiiM App. This could be useful if one corrects for the room and tweaks the speakers but want to apply a "loudness-like" automatic filter to listen at low levels at night.

How do you set number of peq in rew?