Room Correction Beta firmware for WiiM Pro, Pro Plus and Amp - User Testing Experience

[pmalecek]

Those effects @steadyshot recommend to fix (manually) are not a characteristic of your speakers, but your speakers in your very room being placed the way they are (and in fact, it's by far mainly the room at those frequencies).
Just give manual EQ a shot if you are not totally satisfied with the automatic RC so far.

It would probably be a good idea to dampen the room better.

 

[canard]

Comment bien positionner ses enceintes de monitoring? by Audiopole - LightSoundJournal.fr

Cette semaine, Audiopole vous propose deux conseils simples pour améliorer vos conditions d’écoute

www.lightsoundjournal.fr

Monitor Placement - Genelec.com

To create the ideal listening experience, several aspects need to be taken into account when placing the monitors within the listening space. First, you need to identify the listening area within the space and consider where the listener will be placed in relation to the space as well as the...

www.genelec.com

etc etc
(little ps... a funny little example... you can increase a frequency but at the same time you will increase its cancellation... funny right?... and also explains why attenuation than increase is easier to manage ;-) .... etc)

 

[slartibartfast]

It would probably be a good idea to dampen the room better.

Your speakers are effectively in corners and your listening position is near the back wall. You could try the same measurements at different distances from the back wall. You could also try moving the speakers forward away from the cabinets

 

[Musician]

Late to the party but …. Nice to see roomcorrection implemented and more than 4 PEQ in the WiiM .

As an amateur loudspeaker builder ( have done some dsp models before ) and being a person who has done measurements on loudspeaker for 6 years , there is some missunderstandings about measurements :

1. The mic are not functioning as two ears with a brain . Microphones take up all the sound, the brain selects sounds after a certain timespan of delayed sound . This is called the precedence effect and there are things happening inside the brain with sounddelays at about 2 ms and 5 ms that makes the hearing very different than the measurement result from a microphone .
(1 ms of sound travel is 34,3 cm.)

2. Because of this - the microphone must be placed near the speaker if measuring 200-20000 Hz , about 1 meter away and only one speaker should be used while measuring ( the other turned off ) .

3. The span between 20-200 Hz ( or below the schroeder area for the room ) can be measured from the listening position , but you will need a bass shelving boost about +5 dB below 100 Hz ( see Tooles investigations ) .

4. You need a real measurement microphone . An iPhone is not good enough but might be used below 200 Hz . I use a Line audio om1 , flat within +-1 dB 20-20000 Hz , and you need a microphone stand . Measurements between 200-20000 Hz must be done outside with the speaker on a high stand .

5. Its fun to learn about measurements - start with learning about the precedence effect and the schröder frequency .

6. Dont waste 6 years of audiophile measurements to hunt after the perfect sound as I did , doing it the wrong way the first year . Listen to the music instead.

7. Learn about the differences between reflections ( cant be corrected in a good way ) and resonanses ( can be corrected ) .

Resonanses in a room is where the sound bounces between wall-wall, floor-roof . Those can be corrected but reflections coming from the speaker bouncing on the single wall can not.

 

[canard]

all this explains the intance to be able to differentiate left and right in the peq.. (and why the less we need it the better it is , and why for many pro-audiophiles etc. if correct and careful acoustics, prefer to skip the mill of processing num)

ps the brain is a powerful dsp
;-)

 

[Musician]

For the WiiM technical engineers - you can start looking at the Linn space optimisation how they have done it . With that approach , theres not any microphone needed , just mathematical calculations of the room size and corrections below 100 Hz .
This is the correct way to do room correction for an amateur without precision microphones .

 

[Musician]

all this explains the intance to be able to differentiate left and right in the peq.. (and why the less we need it the better it is , and why for many pro-audiophiles etc. if correct and careful acoustics, prefer to skip the mill of processing num)

ps the brain is a powerful dsp
;-)

Measurements below 200 Hz from listening position dont need differentiating L and R . But you cant correct anything above 200 Hz then

The rooms fundamental room resonanses can only be found below 80 Hz .
( Wall-wall, floor-roof , wall-wall )

Those three resonanses can be corrected in a good way, and if one measures the size of the room , you dont need a microphone to find the correction frequencies.

 

[canard]

Measurements below 200 Hz from listening position dont need differentiating L and R . But you cant correct anything above 200 Hz then

I disagree... ;-)

 

[Musician]

I disagree...

You can ofcourse use the PEQ as a tone control between 200-20000 Hz when doing measurements from listening position with two speakers, and do adjustment to taste .

But those corrections will however not give you the ultimate sound because of the precedence effect. The mic has to be placed near the loudspeaker to mirror what you hear from the listening position.
Again , this is the way to do measurements and corrections between 200-20000 Hz . Below 200 Hz theres another story because the soundwaves behaves very different below the transition area.

 

[slartibartfast]

Late to the party but …. Nice to see roomcorrection implemented and more than 4 PEQ in the WiiM .

As an amateur loudspeaker builder ( have done some dsp models before ) and being a person who has done measurements on loudspeaker for 6 years , there is some missunderstandings about measurements :

1. The mic are not functioning as two ears with a brain . Microphones take up all the sound, the brain selects sounds after a certain timespan of delayed sound . This is called the precedence effect and there are things happening inside the brain with sounddelays at about 2 ms and 5 ms that makes the hearing very different than the measurement result from a microphone .

2. Because of this - the microphone must be placed near the speaker if measuring 200-20000 Hz , about 1 meter away and only one speaker should be used while measuring ( the other turned off ) .

3. The span between 20-200 Hz ( below the schroeder area ) can be measured from the listening position , but you will need a bass shelving boost about +5 dB below 100 Hz ( see Tooles investigations ) .

4. You need a real measurement microphone . An iPhone is not good enough but might be used below 200 Hz . I use a Line audio om1 , flat within +-1 dB 20-20000 Hz , and you need a microphone stand . Measurements between 200-20000 Hz must be done outside with the speaker on a high stand .

5. Its fun to learn about measurements - start with learning about the precedence effect and the schröder frequency .

6. Dont waste 6 years of audiophile measurements to hunt after the perfect sound as I did , doing it the wrong way the first year . Listen to the music instead.

7. Learn about the differences between reflections ( cant be corrected in a good way ) and resonanses ( can be corrected ) .

Resonanses in a room is where the sound bounces between wall-wall, floor-roof . Those can be corrected but reflections coming from the speaker bouncing on the wall can not.

Would you recommend measuring each speaker individually at a distance of 1 metre in the room for frequencies above 200Hz and measure each speaker from the listening position for lower frequencies?

 

[Musician]

Would you recommend measuring each speaker individually at a distance of 1 metre in the room for frequencies above 200Hz and measure each speaker from the listening position for lower frequencies?

Yes, but the measurements below 200 Hz can be done with both speakers active.

You also need gating when measuring speakers above 200 Hz and youre in a room, or you need to have them outside the house.

 

[canard]

Would you recommend measuring each speaker individually at a distance of 1 metre in the room for frequencies above 200Hz and measure each speaker from the listening position for lower frequencies?

I know the principles and difficulties of measurements of this type ;-)
my reaction is to your point concerning "under 200hz"... it is necessary to treat in stereo... and not to consider the omni aspect of the extreme bass... not even subject... ;-)

 

[Musician]

I know the principles and difficulties of measurements of this type ;-) *
my reaction is to your point concerning "under 200hz"... it is necessary to treat in stereo... and not to consider the omni aspect of the extreme bass... not even subject... ;-)

* at 1m ..mesureament at 330hz and more ;-)

I agree. The schroeder frequency is very dependable on the room size , it can be between 200-350 Hz in most normal rooms .

 

[canard]

(just as a precaution for exchanges ,
be careful to distinguish between capture for the development of an loudspeaker (the approaches are rather well known and mastered) and room correction...difficult capture AND treatment... ;-) )

too bad that owners of mini-dsp have become quite common in recent years and therefore with hindsight, do not come to exchange their practical experiences
;-)

""long live wavelets!!!"""
;-)

 

[Steve Woodhouse]

ps the brain is a powerful dsp

This is very, very true.

People often say there’s no point in buying expensive speakers for a poor room. But the truth is, if you like speaker A and dislike speaker B, you’re as likely to appreciate or hate them just as much, whether it’s a good room or a poor room.

If there are room issues so bad that they’re bothering you, fix them if you can. But most of the sound of the room will literally disappear as your brain gets used to it and filters it out.

 

[steadyshot]

It would probably be a good idea to dampen the room better.

You need to avoid first reflections . Just bring the speakers outside the room to get them out of the corners.

 

[Smartplug]

I like the first algorithm when the first beta firmware was released and it was exact inverted from measured to eq correction. It made sound improvement but now it’s step backward. I wish they would return that algorithm back. I have eq off since it made sound muffled cutting too much highs.

 

[harkpabst]

... be careful to distinguish between capture for the development of an loudspeaker (the approaches are rather well known and mastered) and room correction...difficult capture AND treatment ...

Very true.

Also true: Every wisdom that fits into a single forum post must be somewhat oversimplified.

 

[canard]

Very true.

Also true: Every wisdom that fits into a single forum post must be somewhat oversimplified.

no understand..
(just a shame if it's funny...it seems)
but not serious...

 

[slartibartfast]

Hi,

To streamline the feedback we're rolling out a feedback platform, that we'd like our testers to submit feedback through.

For those who are beta testing the Room Correction feature, please select "Beta: Room Correction" and create an account through this platform. Our team will review the feedback sent through this platform.

WiiM Testing & Feedback Community

If you would like to join as a beta tester, please sign in, and we'll send you the beta firmware.

The goal is eventually moving all our feedback-related submissions through this Centercode platform. We're still tweaking the platform so thanks for your patience.

If you have any questions, please let us know.

Thank you!
WiiM Team

Has anyone who registered for the Beta firmware using this method received it?