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Old 20th February 2020, 04:29 PM   #1801
Defo is offline Defo  Norway
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Just to be sure I've understood the X, Y and Z parameters correctly - is it correct that I've moved the Seas driver 240 mm down the baffle and 5,28 mm away from the mic here? (with the mic being on axis with the Wavecor driver)
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Old Yesterday, 05:36 AM   #1802
kimmosto is offline kimmosto  Finland
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^That's correct.

Just note that Z mm of driver instance in XO is 0 mm and Delay offset of driver's response data is 0 us if you work according measurement instructions with straight non-stepped and non-tilted baffles because mechanical rotation center while off-axis measurement sequence is at level of baffle surface and timing reference while converting impulse response (semi-dual channel) measurements to frequency response is equal to all drivers. So timing difference of drivers is included in measurement data only, and XYZ of driver instance equals to mechanical rotation center (relative to speakers origin) while off-axis measurement sequence.

In addition, Delay us parameter should be used instead of Z mm for drivers in boxed speakers with straight non-stepped and non-tilted baffles if measured or traced response data is normalized or processed with minimum phase extraction, because Delay works better than Z to high off-axis angles. This was not significant decades ago when speakers were designed with axial response only, but now situation is different with VCAD and others which calculate off-axis too.

All this should be mentioned in measurement instructions and user manual so please read those to get original info asap.
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Old Yesterday, 07:09 AM   #1803
BYRTT is offline BYRTT  Denmark
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VituixCAD
Quote:
Originally Posted by kimmosto View Post
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.
Nice pratical and spare some calculation work, thanks
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Old Yesterday, 08:13 AM   #1804
kimmosto is offline kimmosto  Finland
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^Simple target response divided by measured+merged response works okay for mids and tweeters but woofers need some workaround and possibly manual tweaking because HP slope at low end should be minimum phase. Not linear-phase.
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Old Yesterday, 10:18 AM   #1805
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by diypass View Post
Thank you to Kimmo Saunisto for this wonderfull software, very very gratefull.
it is very complete and powerfull, but you need to know well loudspeaker design.
Software

thank you again.
very interesting for the synergy horn, special the filter design.

regards
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Old Yesterday, 10:20 AM   #1806
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by kimmosto View Post
Thanks guys! Hopefully I can keep this software alive and add some new features in the future, though new ideas and motivation are slowly decreasing. Maybe because it's already so perfect
-Kimmo
Hi Kimmosto


It is very beautifull software, keep it going, helping world community gives the best boost in live you can imagine, feeling good..

regards
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Old Yesterday, 09:35 PM   #1807
kimmosto is offline kimmosto  Finland
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Quote:
Originally Posted by kimmosto View Post
...woofers need some workaround...
Not anymore because

Rev. 2.0.37.0 (2020-02-21)

Main
* Added lin.pha checkbox to High pass and Low pass slopes of driver's target response in Optimizer window. Enables selection of minimum phase or linear phase target slope for File->Export->FIR transfer function for Driver.
* Added 'Driver target phase' curve (magenta) to GD & Phase chart.
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