• Welcome to ASR. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

WiiM Pro - Review & Measurements (Streamer)

antcollinet said:
That is for creating the filter parameters as part of the measurement process.


But once the filters are set up, they have to be implemented/calculated by DSP while the music is playing. This is where the grunt is needed in the MiniDSP.
Click to expand...

You’re saying the WiiM continues to change EQ settings ‘live’ while music is playing?
 
Yorkshire Mouth said:
You’re saying the WiiM continues to change EQ settings ‘live’ while music is playing?
Click to expand...
No. The EQ settings stay the same. The processing power is needed to do the calculations involved in doing the filtering. Assuming the filters are implemented using IIR biquads (quite likely - they're a common, versatile building block) then each biquad requires five multiplications and four additions per sample. Generally a shallow filter will need one biquad, while steeper filters cascade two or more biquads. More filters, or steeper filters, means more biquads so more calculations per sample.
 
somebodyelse said:
No. The EQ settings stay the same. The processing power is needed to do the calculations involved in doing the filtering. Assuming the filters are implemented using IIR biquads (quite likely - they're a common, versatile building block) then each biquad requires five multiplications and four additions per sample. Generally a shallow filter will need one biquad, while steeper filters cascade two or more biquads. More filters, or steeper filters, means more biquads so more calculations per sample.
Click to expand...

Would that processing have to be present for any implementation of PEQ, irrespective of whether it's for room correction or other uses?
 
antcollinet said:
That is for creating the filter parameters as part of the measurement process.


But once the filters are set up, they have to be implemented/calculated by DSP while the music is playing. This is where the grunt is needed in the MiniDSP.
Click to expand...
penny drop - thank you
 
Is the problem with eq fixed? Or do we still have to reduce the volume to 95% to be able to use the eq without considerable degradation in the sound quality as mentioned in the OP.
 
Venkyrenga said:
Is the problem with eq fixed? Or do we still have to reduce the volume to 95% to be able to use the eq without considerable degradation in the sound quality as mentioned in the OP.
Click to expand...
Where in the OP do you see this? I've scanned the OP several times and I can't seem to find where this issue is noted.

Also, why is it a big deal to reduce the volume to prevent what I presume is digital clipping? When utilizing EQ with any amount of boosting you generally need some negative gain to prevent digital clipping, it's not unusual. It would be nice if the Wiim's EQ interface had a field to enter a set amount of negative gain.
 
staticV3 said:
PEQ is a form of DSP (Digital Signal Processing).

You can't have Digital Signal Processing without processing....
Click to expand...

I think maybe I’ve not explained myself clearly.

Yes, I know that EQ is processing.

What I’m trying to say is if the Mini already has PEQ, and the measurements for room correction are done in the phone, then that negates the previous reasons given for the Mini to be more powerful.

It’s the PEQ that needs the grunt (as others have explained it) and the Mini has that already.
 
kyuu said:
When utilizing EQ with any amount of boosting you generally need some negative gain to prevent digital clipping, it's not unusual.
Click to expand...
Even if not boosting some negative gain is advisable as phase shift can still cause clipping. It's a feature of DSP, but it's not important unless you run out of gain.
 
Yorkshire Mouth said:
I think maybe I’ve not explained myself clearly.

Yes, I know that EQ is processing.

What I’m trying to say is if the Mini already has PEQ, and the measurements for room correction are done in the phone, then that negates the previous reasons given for the Mini to be more powerful.

It’s the PEQ that needs the grunt (as others have explained it) and the Mini has that already.
Click to expand...
I may be misremembering but I thought the mini got stuck at 4 PEQs while the rest got more, much like the Mini not being able to handle Squeezelite while the others can. The argument then is whether the room correction can be done with just 4 PEQs rather than the full set.
 
somebodyelse said:
I may be misremembering but I thought the mini got stuck at 4 PEQs while the rest got more, much like the Mini not being able to handle Squeezelite while the others can. The argument then is whether the room correction can be done with just 4 PEQs rather than the full set.
Click to expand...
A firmware update brought the mini up to 10 band PEQ. It's quite a remarkable little thing
 
Yorkshire Mouth said:
So, in short, given that this PEQ capability was already on the Mini, and in relation to my original post (in reply to @Overseas ) I was (for once) correct.
Click to expand...
no..mini didn't have before the peq 10bands of the other wiims... had been announced as impossible on mini in 2022...
and therefore no rc mode that uses it after testing and calculation...
 
morillon said:
no..mini didn't have beforr the peq 10bands of the other wiims... had been announced as impossible on mini in 2022...
and therefore no rc mode that uses it after testing and calculation...
Click to expand...
Except ... the WiiM mini now does have 10 band PEQ (per channel) and room correction ... with no hardware change

Turns out that it wasn't impossible after all.
 
Yorkshire Mouth said:
Would that processing have to be present for any implementation of PEQ, irrespective of whether it's for room correction or other uses?
Click to expand...

Any digital effect of any kind requires processing. Whether that is PEQ, graphic EQ, reverb, compressors, etc and so on - even digital volume control. All of them require calculations to be done on each sample.
 
kyuu said:
Where in the OP do you see this? I've scanned the OP several times and I can't seem to find where this issue is noted.

Also, why is it a big deal to reduce the volume to prevent what I presume is digital clipping? When utilizing EQ with any amount of boosting you generally need some negative gain to prevent digital clipping, it's not unusual. It would be nice if the Wiim's EQ interface had a field to enter a set amount of negative gain.
Click to expand...
"Obviously, you do not want to use EQ at fixed volume, unless 57dB SINAD (before D/A conversion) is something you are looking for... It becomes way cleaner with volume is unlocked, the lowered at about 95%. This issue could be easily fixed by firmware, by setting max volume about 1dBFS down."

This is from the OP.
Since then some changes have happened in the app. You no longer need to unlock the fixed volume to lower it. You can do that in the volume limit and keep the fixed volume on.
So I am just wondering if I still need to do that or is the issue fixed. Or I only need to lower the volume when I apply positive gain in the EQ.
 
Last edited:
You must log in or register to reply here.

Similar threads

amirm
  • Poll Poll
WiiM Pro Streamer Review
8 9 10
Replies
194
Views
39K
dr.n
D
H
Poor man’s ARC or Dirac for WiiM products: 80% of the results for €0
2
Replies
35
Views
4K
morillon
morillon
S
Leveling up from my Wiim Ultra Amp
2
Replies
27
Views
3K
harkpabst
harkpabst
Occamsrazor
Low-end streamer/endpoint/transport advice please... (Roon + Spotify)
Replies
3
Views
542
Occamsrazor
Occamsrazor
Gorgonzola
  • Poll Poll
Streamer versus Computer?
5 6 7
Replies
126
Views
8K
shuppatsu
S
Back
Top Bottom