Does target curve filter auto-fit software exist?

[jhaider]

Does anyone know of a software that can take a target curve and automatically generate PEQ/shelf filters to match it?

For example (assuming one could separate the 4 traces for different midrange presets) is there a software that could take the MF/HF processing curves for NHT Xd measured by Audioholics (below), and generate filters for a miniDSP PWR-ICE250? That's the goal.

 

[Jimbob54]

Does anyone know of a software that can take a target curve and automatically generate PEQ/shelf filters to match it?

For example (assuming one could separate the 4 traces for different midrange presets) is there a software that could take the MF/HF processing curves for NHT Xd measured by Audioholics (below), and generate filters for a miniDSP PWR-ICE250? That's the goal.

Dont ask me how but I am pretty sure REW can. Based on this https://www.audiosciencereview.com/...man-ananda-review-headphone.22281/post-741861

 

[Daverz]

You could try recording the output of the XDA processor at the speaker terminals with a REW sweep, taking care not to overload the recording interface. A stacking banana to BNC connector combined with a BNC to RCA or TRS adapter might be helpful here. Then export the impulse response, I think you want to use acoustic timing reference rather an a loopback reference for the sweep measurement, since you don't really want the DSP delay included in the impulse response.

 

[McFly]

VituixCAD can do this

 

[jhaider]

Dont ask me how but I am pretty sure REW can. Based on this https://www.audiosciencereview.com/...man-ananda-review-headphone.22281/post-741861

Sorry, I don’t follow. I think the target curve in REW uses breakpoints, not an actual curve. Right?

VituixCAD can do this

Did Kimmo add an optimizer? I know you can do it manually with V-CAD but thought he was generally against machine optimizers.

 

[pkane]

Sorry, I don’t follow. I think the target curve in REW uses breakpoints, not an actual curve. Right?

No, you can set a target curve from an arbitrary frequency response text file, and then ask REW to correct to this target curve. REW will even interpolate between the points in the frequency response to create a smoother curve for you.

https://www.roomeqwizard.com/help/help_en-GB/html/housecurve.html

 

[McFly]

Did Kimmo add an optimizer? I know you can do it manually with V-CAD but thought he was generally against machine optimizers.

Yep

 

[jhaider]

No, you can set a target curve from an arbitrary frequency response text file, and then ask REW to correct to this target curve. REW will even interpolate between the points in the frequency response to create a smoother curve for you.

https://www.roomeqwizard.com/help/help_en-GB/html/housecurve.html

Very interesting. I had no idea! I exported a random measurement from REW and was able to load it as a "house curve." I then used a flatline measurement I had and was able to get an automated fit in a couple minutes. It wasn't perfect but was certainly a good starting point.

[VituixCAD optimizer] Yep

Again, glad I asked! A program I use fairly often but simply did not know about this functionality! I poked around and definitely looks more involved (as I understand it, I have to enter the 20 filters as HS/LS/PEQ blocks and then run the optimizer) but also more powerful (ability to use high/low shelfs, do the crossover and EQ in one pass etc.) I will have to play around more with this!