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Old 9th September 2019, 07:24 PM   #1471
kimmosto is offline kimmosto  Finland
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If you have miniDSP, you can convert parameters of selected generic active blocks to biquad coefficients with Copy Biquad coeffs command in context menu, and paste from clipboard to Advanced filter view in miniDSP application. That is recommended procedure because allows keeping generic active blocks in your VituixCAD project, optimizer working and manual adjustments possible for human. Converting generic active blocks to biquads in VCAD schema is one-way procedure which can be reversed with Undo only.
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Old 9th September 2019, 08:10 PM   #1472
kaameelis is offline kaameelis  Estonia
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This is good, little like REW, but it can not optimize 2 or more way DSP filters for speakers. I had no miniDSP, it is actually active speaker with STA350 amp using embedded DSP, but biquad mathematics behind is same.

Last edited by kaameelis; 9th September 2019 at 08:16 PM.
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Old 10th September 2019, 04:17 AM   #1473
kimmosto is offline kimmosto  Finland
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Room response EQ and speakers designing are two different tasks no matter how many ways. Directivity features can be included in optimizing process also with single driver full range (should be included with multi-way). Designer should be at least aware of power & DI and other off-axis features before making decisions for room response EQ or let some application make decisions for him/her (which is modern but not so smart).
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Old 10th September 2019, 04:51 AM   #1474
kimmosto is offline kimmosto  Finland
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For those who keep Windows Taskbar on top or left: the latest build of 2.0.24.1 (few minutes ago) is fixed to handle those cases so that program windows are not positioned behind taskbar on startup.
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Old 10th September 2019, 03:46 PM   #1475
ergo is offline ergo  Estonia
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Thanks Kimmo for continuing to tweak even the smallest items towards better
I'm one of them who keeps the taskbar on left... I missed the aspect ratio of 16:10 I had on prior Dell monitor and moving the taskbar away from bottom achieves a similar work area on 16:9 monitor.
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Old 12th September 2019, 07:55 PM   #1476
kaameelis is offline kaameelis  Estonia
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Quote:
Originally Posted by kimmosto View Post
Room response EQ and speakers designing are two different tasks no matter how many ways. Directivity features can be included in optimizing process also with single driver full range (should be included with multi-way). Designer should be at least aware of power & DI and other off-axis features before making decisions for room response EQ or let some application make decisions for him/her (which is modern but not so smart).
I mean similar is optimization with "blocks with f, Q and gain parameters". Sure speaker design and room correction are totally different things. Still, if not counting directivity, then for on-axis response only for speaker designe optimization also REW can be used with not bad results.
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Old 13th September 2019, 05:15 AM   #1477
kimmosto is offline kimmosto  Finland
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Quote:
Originally Posted by kaameelis View Post
if not counting directivity, then for on-axis response only for speaker design
"If not counting directivity" is not proper design approach so any tool which cannot handle off-axis and total power in invalid for this job
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Old 13th September 2019, 05:17 AM   #1478
kimmosto is offline kimmosto  Finland
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Rev. 2.0.25.0 (2019-09-13)

* User manual in English converted to CHM file installed to application directory. PDF files are still available online via links at home page.
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Old 13th September 2019, 02:49 PM   #1479
kaameelis is offline kaameelis  Estonia
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Quote:
Originally Posted by kimmosto View Post
"If not counting directivity" is not proper design approach so any tool which cannot handle off-axis and total power in invalid for this job
I agree with this.
Only for some loudspeakers directivity information is not available, you can measure it after you had bought loudspeakers and cannot change its dierctivity after you get it on hands.
I add also image how I made optimization in REW. Grey line is measured tweeter on-axsis response (2 ms gated from 70 cm, Neo X2.0, little disappointment for me, on datasheet bump on 12 kHz is about 5 dB, in real it is about 12 dB), black with yellow is optimized result, filter blocks and target are described on image. I only defined my target response and HP filter manually, rest are all automatically generated by REW. It can also generate more blocks with f, Q and gain, depending from physical EQ device type selected and filter task parameters. "Save filter coefficients to file" in REW give biquads in text format.
Attached Images
File Type: png RewOptimize2.png (141.5 KB, 136 views)

Last edited by kaameelis; 13th September 2019 at 03:06 PM.
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Old 17th September 2019, 04:47 AM   #1480
kimmosto is offline kimmosto  Finland
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Rev. 2.0.25.1 (2019-09-17), the latest build few minutes ago

* Phase response interpolation calculated with complex numbers to avoid possible problems due to phase unwrapping.
* Phase response smoothing and merging calculated with complex numbers to avoid possible problems due to phase unwrapping.
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