Beta Test: Room Correction for Individual Channels

[slartibartfast]

It works!

I didn't compare the results with REW measurements or anything else but at least I do get individual calibrations for left and right channel.

How many sweeps does it do?

 

[MCG555]

It works!

I didn't compare the results with REW measurements or anything else but at least I do get individual calibrations for left and right channel.

Anything more in respect to comparison to the previous none individual version? Is there an audible difference and if, how can it be described?
How foes it work? First one channel, than the other? Or both at the same time?
Thanks!

 

[harkpabst]

Or both at the same time?

How would you want to capture two sweeps at the same time? In the same room? Using a single microphone?

One chirp plus one sweep per channel. You have to tap a button to start the second channel sweep. I didn't have the time to make any listening comparison, yet, but the filters are very much different for the left and the right speaker in my setup. The left speaker is much closer to the corner than the right one.

 

[squirrel_nutcase]

I've tried both stereo and single channel room correction modes and get a similar result at the end with the evaluation, although this was with my Samsung s22 built in mic. Tomorrow I'll get out a proper mic and see what results I get and post them.

 

[MCG555]

How would you want to capture two sweeps at the same time? In the same room? Using a single microphone?

I don’t know, that is why I am asking. Because at the end, both channels play together! Mods come together and multiply each other, all kind of complex…
So I just wondered how RC is handling this comlexity. And if results are really different.
However, thanks for your feedback anyway…

 

[harkpabst]

I've tried both stereo and single channel room correction modes and get a similar result at the end with the evaluation ...

That's more or less to be expected since the evaluation is always performed in stereo mode, so the single mic always picks up the combined response of both speakers and the target curve hasn't changed.

 

[MCG555]

I've tried both stereo and single channel room correction modes and get a similar result at the end with the evaluation, although this was with my Samsung s22 built in mic. Tomorrow I'll get out a proper mic and see what results I get and post them.

Interesting. Thanks!

 

[MCG555]

That's more or less to be expected since the evaluation is always performed in stereo mode, so the single mic always picks up the combined response of both speakers and the target curve hasn't changed.

Well then, why make the effort if the result is the same?

 

[harkpabst]

I don’t know, that is why I am asking. Because at the end, both channels play together! Mods come together and multiply each other, all kind of complex…
So I just wondered how RC is handling this comlexity. And if results are really different.

The way we listen to music is not by means of a single mic mounted to our forehead, though.

The room modes are a characteristic of the room, in the first place. But it's true that they might not get excited in the same way depending on how many speakers are playing at the same time. In the end, if the superposition principle wasn't applicable, we'd have exactly the same differences with music featuring different bass content left and right.

Well then, why make the effort if the result is the same?

The result isn't the same. It's just the same to one single mic in exactly one position, not to your ears and your brain.

And we don't usually play monophonic content all the time.

 

[slartibartfast]

That's more or less to be expected since the evaluation is always performed in stereo mode, so the single mic always picks up the combined response of both speakers and the target curve hasn't changed.

You said there were two sweeps though.

 

[harkpabst]

You said there were two sweeps though.

Yeah, I was lying. It's three sweeps including the evaluation.

 

[Smartplug]

Yeah, I was lying. It's three sweeps including the evaluation.

Was the beta you got for which wiim?

 

[slartibartfast]

Yeah, I was lying. It's three sweeps including the evaluation.

Ah you said the evaluation was in stereo mode, got it. I might eventually be able to try myself

 

[harkpabst]

Was the beta you got for which wiim?

Beta firmware for Ultra and Amp. The app isn't beta, it just supports the beta firmware introducing RC for individual channels.

 

[slartibartfast]

Like I suspected Room Correction using individual channels produce too much bass. I only tried with a subwoofer. First two results are from individual channels and third is stereo.

 

[harkpabst]

Close to no similarity. Strange.

This one looks particularly suspicious :

 

[Smartplug]

Like I suspected Room Correction using individual channels produce too much bass. I only tried with a subwoofer. First two results are from individual channels and third is stereo.
View attachment 11564

View attachment 11565

View attachment 11566

The stereo official rc cut too much bass so I had to limit to 3 because if I choose 10 it will use all of it. Interesting individual is the opposite of stereo producing more bass.

 

[slartibartfast]

The stereo official rc cut too much bass so I had to limit to 3 because if I choose 10 it will use all of it. Interesting individual is the opposite of stereo producing more bass.

I think it is due to the bass being closely correlated between channels so it is unnaturally boosted when both channels are played together.

 

[slartibartfast]

Close to no similarity. Strange.

This one looks particularly suspicious :
View attachment 11567

It does look weird. I have my sub set to +5dB expecting cuts rather than boosts. I get cuts for the stereo RC but boosts for the L/R RC. Some might prefer it like that but playing Bad Guy by Billie Eilish makes all the furniture vibrate

 

[Smartplug]

It’s in beta stage so it’s algorithm will changes before public release.