L/R channel Room Correction with subwoofer using REW

[slartibartfast]

Since WiiM seem to be having difficulty in getting Room Correction working with L/R channel PEQ and a subwoofer I tried using REW. I measured both channels individually using pink noise and the Moving Magnet Method. My target curve was a modified B&K curve to remove the bass boost caused by correlated signals in the subwoofer. My subwoofer crossover frequency was 80Hz and I modified the target by reducing the level by 3dB/octave between 100Hz and 60Hz. The red curve is the left channel plus sub, the blue curve is the right channel plus sub and the green curve is the final result while playing both channels plus subwoofer. I was surprised to see a dip in the final result at a frequency where neither channel had a dip but it sounds fine.

 

[Smartplug]

Since WiiM seem to be having difficulty in getting Room Correction working with L/R channel PEQ and a subwoofer I tried using REW. I measured both channels individually using pink noise and the Moving Magnet Method. My target curve was a modified B&K curve to remove the bass boost caused by correlated signals in the subwoofer. My subwoofer crossover frequency was 80Hz and I modified the target by reducing the level by 3dB/octave between 100Hz and 60Hz. The red curve is the left channel plus sub, the blue curve is the right channel plus sub and the green curve is the final result while playing both channels plus subwoofer. I was surprised to see a dip in the final result at a frequency where neither channel had a dip but it sounds fine.


View attachment 15769

How’s does it sound? We’ve been doing so much time measurement that we spend less time listening trying to get the sound we seek. The tread is become measuring tread and not saying how they like the outcome. Everyone ear is different and I think once they run rc and if they don’t like what they hear they can manually tweak it to their liking or turn it off. I just run rc one time and that’s it no point of running multiple times comparing and contrasting or otherwise I just use my wiim as a toy to play on measuring to feast my eyes. Enjoy the music!

 

[slartibartfast]

How’s does it sound? We’ve been doing so much time measurement that we spend less time listening trying to get the sound we seek. The tread is become measuring tread and not saying how they like the outcome. Everyone ear is different and I think once they run rc and if they don’t like what they hear they can manually tweak it to their liking or turn it off. I just run rc one time and that’s it no point of running multiple times comparing and contrasting or otherwise I just use my wiim as a toy to play on measuring to feast my eyes. Enjoy the music!

I sounds fine, but then so did stereo room correction. The biggest improvement was using the UMIK-1 mic.

 

[Smartplug]

I sounds fine, but then so did stereo room correction. The biggest improvement was using the UMIK-1 mic.

Happy new year! You think if I get umik 1 to use on my iPhone would be night and day difference? I ask because umik is not a cheap mic and if it’s just gives me 5 percent increase over iPhone mic I don’t see it’s a good investment.

 

[Dako]

does the subwoofer channel get corrected of the sum of left and right correction when using L/R PEQ?

 

[slartibartfast]

Happy new year! You think if I get umik 1 to use on my iPhone would be night and day difference? I ask because umik is not a cheap mic and if it’s just gives me 5 percent increase over iPhone mic I don’t see it’s a good investment.

I have no idea how well the iPhone mic works. In my case the iMM6 low end was rolled off by the phone ADC circuit. You need to find someone locally who has one and borrow it.

 

[Smartplug]

does the subwoofer channel get corrected of the sum of left and right correction when using L/R PEQ?

It doesn’t work with sub only stereo rc. When you turn off the sub and run rc it will give a choice which one. If it’s on, it’s straight stereo rc.

 

[Smartplug]

I have no idea how well the iPhone mic works. In my case the iMM6 low end was rolled off by the phone ADC circuit. You need to find someone locally who has one and borrow it.

When you get a chance can you please compare and contrast usb and coax output? I could hear some difference between the two. I google it and found the answer According to many audiophiles, a coaxial connection can sometimes sound better than a USB connection, with some describing the coax sound as more full, rich, and dynamic, while USB may sound clearer and more detailed but potentially lacking in musical "punch.". However, the difference can be subtle and depends heavily on the quality of the DAC and the specific setup used, with some users not noticing a significant difference at all.

 

[Dako]

It doesn’t work with sub only stereo rc. When you turn off the sub and run rc it will give a choice which one. If it’s on, it’s straight stereo rc.

I mean if you’re using the PEQ not RC

 

[slartibartfast]

does the subwoofer channel get corrected of the sum of left and right correction when using L/R PEQ?

I copied across the filters from REW to the L/R PEQ settings of the WiiM. The corrected left and right signals will be combined in the same way as the non corrected signals in the subwoofer.

 

[MCG555]

I sounds fine, but then so did stereo room correction. The biggest improvement was using the UMIK-1 mic.

In my opinion and in my setup, L/R setup adds clearly more space to the soundstage and instrument seperation is pronounced!
This makes also rationally sense, as the corrected L/R signals are different from each other, even if the signal would be mono.

I very much like it Honestly I don‘t know if this result can be much further improved. Maybe with additional timing alignment.
The difference from the original output (without RC) when I bought the Pro+ to the now corrected Room Acoustic is astonishing!

 

[MCG555]

Since WiiM seem to be having difficulty in getting Room Correction working with L/R channel PEQ and a subwoofer I tried using REW. I measured both channels individually using pink noise and the Moving Magnet Method. My target curve was a modified B&K curve to remove the bass boost caused by correlated signals in the subwoofer. My subwoofer crossover frequency was 80Hz and I modified the target by reducing the level by 3dB/octave between 100Hz and 60Hz. The red curve is the left channel plus sub, the blue curve is the right channel plus sub and the green curve is the final result while playing both channels plus subwoofer. I was surprised to see a dip in the final result at a frequency where neither channel had a dip but it sounds fine.


View attachment 15769

This looks great!

 

[slartibartfast]

This looks great!

I'll leave it like that for a while