Room correction: very strange Per Channel algorithm and it's respective results

[s3igell]

While not Optimum, the result should be the same (unless your DAC is truly coloring the output), no??

@Maurizio, @AlxTMX - Asking again, since both of you insisted on workarounds that used your External DAC: Why do you apparently believe the selection of well-measuring DAC would impact the Room Correction results (since RC is mainly a factor of Room, Speakers, and minorly Amp)??

 

[Maurizio]

@Maurizio, @AlxTMX - Asking again, since both of you insisted on workarounds that used your External DAC: Why do you apparently believe the selection of well-measuring DAC would impact the Room Correction results (since RC is mainly a factor of Room, Speakers, and minorly Amp)??

I use my Dac because is far better than the internal one.
The fact is that every DAC, for me, has his “voice”. I obtained different curves changing DAC. Same room, same listening point, same streamer, different DAC different curves.
I agree that Room Correction has to do with room, but…what do you measure? The sound that comes out of loudspeakers. Now, if you change your Amp or DAC or Cartridge on a turntable, you will have different sounds that will impact in different ways on your room. More or less bass, more or less treble and so on. From here the different curves I have obtained.

 

[slartibartfast]

So, it appears this is related to WiiM triggering something undesirable in Certain OTHER Maker's DACs. Hard to Debug without the unlikely cooperation of that Competitor's Engineering Team.
How much effort should WiM dedicate to this odd issue versus turning those resources on the long list of other Fixes and Betas and New Features??
Lists that you @Maurizio feature rather prominently...

It is failing at playing a sweep through the DAC. Presumably the Ultra can play music through the DAC so a sweep shouldn't be a problem.

 

[s3igell]

It is failing at playing a sweep through the DAC. Presumably the Ultra can play music through the DAC so a sweep shouldn't be a problem.

Look back at both their posts - the Ultra DAC is NOT failing to produce the Sweeps. Rather, certain External DACs are triggered by something about the Sweeps, and then producing Odd Noise instead of the steady Sweep Tones.

 

[Maurizio]

It is failing at playing a sweep through the DAC. Presumably the Ultra can play music through the DAC so a sweep shouldn't be a problem.

Hi @slartibartfast
It's just like @s3igell says "the Ultra DAC is NOT failing to produce the Sweeps. Rather, certain External DACs are triggered by something about the Sweeps, and then producing Odd Noise instead of the steady Sweep Tones."
This is the situation which drives me crazy because I don't understand what it could depend on :
1) I use the Ultra every day for listening to music and it works perfectly with all connections and all resolutions.
2) If I do the room correction in stereo inside PEQ of WHA, I have the sweep tone and everything works
3) If I do room correction the way I used to before WiiM introduced auto-correction (amp balance all to the left, measure, curve, save. amp balance all to the right. measure, curve, save. Last step copy the obtained values into the PEQ for channel ) I have sweep tone on both left and right and everything is fine.
The problem only occurs if I try to do automatic room correction. At that point something, I don't know what, is triggered that produces noise instead of sweep tones.
Another strange thing is that if I use House Curve with the same Ultra, same connection cables, same DAC, I can measure per channel and get the correct sweep tone both on the right and left.
So it seems that it has something to do with automatic room correction and WHA.
I really don't know what to think.

 

[AlxTMX]

So, it appears this is related to WiiM triggering something undesirable in Certain OTHER Maker's DACs. Hard to Debug without the unlikely cooperation of that Competitor's Engineering Team.

Absolutely. It's highly unlikely that anything can be done here without the help of the WiiM team at least that is clearly not interested in it.
And as our discussion here has clearly reached a dead end I suggest we forget about it, since we have a workaround, at least.

 

[MCG555]

To be honest, as nobody else is experience this issue with various DACs, I would conclude the problem is rather on the DAC side…

 

[AlxTMX]

To be honest, as nobody else is experience this issue with various DACs, I would conclude the problem is rather on the DAC side…

No, it's not. Completely wrong. But never mind.

 

[Maurizio]

To be honest, as nobody else is experience this issue with various DACs, I would conclude the problem is rather on the DAC side…

Hi @MCG555
It’s not. Please, read point 3) of my post
3) If I do room correction the way I used to before WiiM introduced auto-correction (amp balance all to the left, measure, curve, save. amp balance all to the right. measure, curve, save. Last step copy the obtained values into the PEQ for channel ) I have sweep tone on both left and right and everything is fine.
The problem only occurs if I try to do automatic room correction. At that point something, I don't know what, is triggered that produces noise instead of sweep tones.
Another strange thing is that if I use House Curve with the same Ultra, same connection cables, same DAC, I can measure per channel and get the correct sweep tone both on the right and left.
So it seems that it has something to do with automatic room correction and WHA.
Anyway i agree with @AlxTMX. This discussion has reached a dead end, so….we can forget all this matter.

 

[MCG555]

Hi @MCG555
It’s not. Please, read point 3) of my post
3) If I do room correction the way I used to before WiiM introduced auto-correction (amp balance all to the left, measure, curve, save. amp balance all to the right. measure, curve, save. Last step copy the obtained values into the PEQ for channel ) I have sweep tone on both left and right and everything is fine.
The problem only occurs if I try to do automatic room correction. At that point something, I don't know what, is triggered that produces noise instead of sweep tones.
Another strange thing is that if I use House Curve with the same Ultra, same connection cables, same DAC, I can measure per channel and get the correct sweep tone both on the right and left.
So it seems that it has something to do with automatic room correction and WHA.
Anyway i agree with @AlxTMX. This discussion has reached a dead end, so….we can forget all this matter.

Just take it easy.
I said „I would conclude“. I don’t know. It was an assumtion.
I don‘t have that issue.
Hope you find a solution.

 

[Joseespona]

Hi @MCG555
It’s not. Please, read point 3) of my post
3) If I do room correction the way I used to before WiiM introduced auto-correction (amp balance all to the left, measure, curve, save. amp balance all to the right. measure, curve, save. Last step copy the obtained values into the PEQ for channel ) I have sweep tone on both left and right and everything is fine.
The problem only occurs if I try to do automatic room correction. At that point something, I don't know what, is triggered that produces noise instead of sweep tones.
Another strange thing is that if I use House Curve with the same Ultra, same connection cables, same DAC, I can measure per channel and get the correct sweep tone both on the right and left.
So it seems that it has something to do with automatic room correction and WHA.
Anyway i agree with @AlxTMX. This discussion has reached a dead end, so….we can forget all this matter.

I happened to have a similar issue but only on the right channel. Normal sweep in the left and noise in the right. I had it set 20-20000. Then I changed the frequency to 30-4000 and then it worked

 

[Maurizio]

I happened to have a similar issue but only on the right channel. Normal sweep in the left and noise in the right. I had it set 20-20000. Then I changed the frequency to 30-4000 and then it worked

Hi @Joseespona
In fact, from the left channel, initially, the sweep tone comes out, but in the last 3/4 seconds it becomes an unidentified noise.
From the right channel only that unidentified noise.
I have never set 20 - 20,000. I have always used the default settings, 40 - 4.000. I may try 30 - 4.000 like you did, although I doubt changing 40 to 30 will make a difference.