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[Peter Morris]

Hi Helge,
Such setup is too much complex to have a reliable result : )
Any convolution plugin can serve this function. I can help you with one.
But most important thing is not a fir filter as processing unit but how to create its coefficients.
This is very tricky because the power and possibilities of fir are so high that it may "destroy" your system.
The predistortions of fir EQ (any EQ as well) must be respective to distortions of your system. They will compensate each other in such case.
Otherwise, you will have new additional distortions created by improper EQ.
How do you create fir for your test?


BR,
Raimonds

Hi Raimonds,

Here is the link to FIR designer that Helge mentioned https://eclipseaudio.com.au/fir-designer/

BTW still getting great results with TDA and TDA EQ 

Regards
Peter

[Helge A Bentsen]

Hi Raimonds,

Here is the link to FIR designer that Helge mentioned https://eclipseaudio.com.au/fir-designer/

BTW still getting great results with TDA and TDA EQ 

Regards
Peter

TDA EQ looks interesting. What do you think of it?

[Peter Morris]

TDA EQ looks interesting. What do you think of it?

TDA EQ uses a logarithmic sine wave sweep to determine the speaker’s frequency response.  I think there are advantages with this approach especially when measuring lower frequencies.

When I set up speakers with TDA EQ my results are better than when I have just used Smaart or Systune.

One of the things I especially like is being able to see what is happening in the time domain, you can see resonant issues and where there are reflections.
 
With a log sweep it’s also possible to determine the distortion products, I don’t have this option but the later versions do.

[Helge A Bentsen]

TDA EQ uses a logarithmic sine wave sweep TDA EQ to determine the speaker’s frequency response.  I think there are advantages with this approach especially when measuring lower frequencies.

When I set up speakers with TDA EQ my results are better than when I have just used Smaart or Systune.

One of the things I especially like is being able to see what is happening in the time domain, you can see resonant issues and where there are reflections.
 
With a log sweep it’s also possible to determine the distortion products, I don’t have this option but the later versions do.

Interesting.

One of the things I'm trying to address is an easier way of identifying frequencies in the low end that sounds wrong because they have different decay times than the rest of the spectrum around them.
Right now I'm using the Spectrograph in Smaart but it's not as fast as I wish.

Can TDA EQ help with this you think?

[Peter Morris]

Interesting.

One of the things I'm trying to address is an easier way of identifying frequencies in the low end that sounds wrong because they have different decay times than the rest of the spectrum around them.
Right now I'm using the Spectrograph in Smaart but it's not as fast as I wish.

Can TDA EQ help with this you think?

Here is measurement I made, and an example of one of the TDA EQ screen displays ... as this topic is on FIR correction, you can see what the Lake's FIR filters can do.

This link may also be of interest -  https://soundforums.net/forum/pro-audio/product-reviews/205223-a-new-way-of-looking-at-speakers-and-rooms-review-of-apl-tda

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