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Old 13th February 2020, 04:54 PM   #1791
mmu7x is offline mmu7x
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I'm having some difficulties with the software. Basically I want to:
1. Simulate box response
2. Merge this data with the FRD files that Dayton posts
2. Merge the resulting data with simulated diffraction
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Old 14th February 2020, 07:01 AM   #1792
kimmosto is offline kimmosto  Finland
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^Focus to response filenames with "hor 0" and 'Far field measurements' checkbox in Merger.
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Old 14th February 2020, 09:37 PM   #1793
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For some reason I keep getting this error following your steps?



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Old 15th February 2020, 05:42 AM   #1794
kimmosto is offline kimmosto  Finland
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^LF response filename exported with Enclosure should end with " hor 0.frd" to match with traced response in HF response list.
Also HF far field response filename is better to be " hor 0.frd" instead of @0.frd by Dayton to specify the plane.

These rules might look complex and unnecessary for a single direction, but purpose is to enable merging of e.g. 74 simulated LF far field responses to 74 measured far field responses (angle step is 5 deg in both planes). Merging of multiple files is almost impossible without clear naming rule. But all this should be clear because file naming policy has been explained on web site and all help documents.
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Old 19th February 2020, 05:25 AM   #1795
kimmosto is offline kimmosto  Finland
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Quote:
Originally Posted by kimmosto View Post
^LF response filename exported with Enclosure should end with " hor 0"
This rule is removed from the latest build of 2.0.35.0 (2020-02-19) which also enables merging of single far field LF response to multiple far field HF responses (though that does not make much sense with other than perfect omni at LF).
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Old 19th February 2020, 06:42 PM   #1796
Defo is offline Defo  Norway
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I like to use the 3D feature of XSim3d to find the best placement of each driver on the baffle in regards for phase. Same goes for speaker tilting.

What's the correct/best way of doing this in VituixCAD?

I've tried to play around with X, Y, R, and T parameters on each driver, but I'm unable to replicate the XO suckout I get from certain angles in XSim.
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Old 19th February 2020, 07:51 PM   #1797
kimmosto is offline kimmosto  Finland
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Quote:
Originally Posted by Defo View Post
What's the correct/best way of doing this in VituixCAD?
I'm not sure what is the problem and your goal but:
Load adequate amount of off-axis response data for each driver model to enable off-axis and directivity plots and all quasi 3D features at least in two planes (hor & ver), including all effects of X,Y,Z,R,T parameters of each driver instance in XO. "Off-axis response data" is mostly measured, but typically near field LF with simulated baffle loss is merged with far field HF measurements with boxed speakers. Data can be simulated with Enclosure and Diffraction tools, but that's not valid for final design.
Of course you can play with axial (hor 0) responses only but that's not recommended for final XO design. Only to verify are drivers suitable for the project. Some limits (giving impression of malfunction) may also exist.
See "How to start..." and "Checklist for designing a loudspeaker" in user manual.
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Old 19th February 2020, 08:01 PM   #1798
Defo is offline Defo  Norway
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Quote:
Originally Posted by kimmosto View Post
I'm not sure what is the problem and your goal but:
Load adequate amount of off-axis response data for each driver model to enable off-axis and directivity plots and all quasi 3D features at least in two planes (hor & ver), including all effects of X,Y,Z,R,T parameters of each driver instance in XO. "Off-axis response data" is mostly measured, but typically near field LF with simulated baffle loss is merged with far field HF measurements with boxed speakers. Data can be simulated with Enclosure and Diffraction tools, but that's not valid for final design.
Of course you can play with axial (hor 0) responses only but that's not recommended for final XO design. Only to verify are drivers suitable for the project. Some limits (giving impression of malfunction) may also exist.
See "How to start..." and "Checklist for designing a loudspeaker" in user manual.
Thanks for the response!

My goal is to simulate the effect of tilting the baffle and/or different placements of woofer and tweeter.

For example, in XSim3d I find some designs works best with woofer on top and listening height above the woofer. And some designs work best with tweeter on axis with listening height, but with a tilted baffle (i.e time alignment).
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Old 20th February 2020, 05:20 AM   #1799
kimmosto is offline kimmosto  Finland
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^Ok. So you just need to create adequate off-axis response data for the drivers in the main program. Sample projects (Epe-3W and Kontiainen) can be used for testing how position and tilt of each driver affect, and studying what is "adequate off-axis response data", how response files could be named and so on.
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Old 20th February 2020, 07:57 AM   #1800
kimmosto is offline kimmosto  Finland
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Rev. 2.0.36.0 (2020-02-19)
Main
* Added File->Export->FIR transfer function for Driver i.e. driver's linear-phase target response divided by raw response to reference angle.
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