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Old 1st May 2010, 05:44 AM   #1091
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Default Hornresp Version 26.40

Hi Everyone,

Hornresp Version 26.40 has just been released. Changes are:

* The Loudspeaker Wizard S1 to S6 sliders for other than tapped horns, and the Vtc slider for all horns, now have value-dependent multipliers. See my earlier post #1079 for details. My thanks to David_Web for suggesting the enhancement.

* Ap1 and Lpt can now be used with conventional and compound horns to specify a conical adaptor between the throat chamber and the horn throat. The adaptor can be considered as part of a compression driver, or alternatively, as an additional conical segment to form a 5 segment horn.

Ap1 = conical adaptor entry or 'throat'
Lpt = conical adaptor length
S1 = conical adaptor 'mouth'

Note that the Horn Segment Wizard works with the adaptor, and that Ap1 and Lpt can still be used to specify a throat chamber port in an offset driver or tapped horn.

* A bug which under some circumstances caused the Loudspeaker Wizard combined response baseline to be calculated incorrectly, has been fixed.

Kind regards,

David
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Old 1st May 2010, 04:24 PM   #1092
FlipC is offline FlipC  United States
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Ahh it keeps getting better and better.
David McBean FTW!

Is it possible to tell it to use combined response before Calculations?
Make it easier to compare.

Also still down for "memory" slots to be able to compare multiple designs at once.
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Old 2nd May 2010, 07:27 AM   #1093
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Hi FlipC,

Quote:
Originally Posted by FlipC View Post
Is it possible to tell it to use combined response before Calculations? Make it easier to compare.
The way that Hornresp has evolved, unfortunately the work now required to make such a change would be considerable. It is unlikely to happen, as from my perspective the benefit to be gained is not particularly great. There would also be the added complication of having to specify a path length difference before calculating any results at all.

As far as comparing combined responses is concerned, one set of results can be captured by pressing Ctrl+C and then compared to a second set by pressing F4. It works for me :-).

Quote:
Originally Posted by FlipC View Post
Also still down for "memory" slots to be able to compare multiple designs at once.
Sorry, but the memory slots now provided with the Loudspeaker Wizard are about as far as I am prepared to go :-).

While there are certainly lots more improvements that could be made to Hornresp, the program has now reached the point where the addition of any 'major' new features would probably require a complete re-write of the code to implement properly. It is not something that I am in a position to undertake. Life is short, and I am not getting any younger... :-).

Kind regards,

David
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Old 2nd May 2010, 08:24 AM   #1094
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Hi FlipC,

One other thing that I forgot to mention - if the Loudspeaker Wizard is used, then either the Default, Output 2 or Combined option can be set for all SPL response calculations. It is not necessary to display the default response before the combined response can be calculated.

Kind regards,

David
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Old 2nd May 2010, 11:59 AM   #1095
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Hi David

I started messing with the latest down load and I like it! I like it a lot!

Mark
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Old 3rd May 2010, 04:46 PM   #1096
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Quote:
Originally Posted by FlipC View Post
Ahh it keeps getting better and better.
David McBean FTW!
Yeah it does
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Old 3rd May 2010, 08:59 PM   #1097
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Hey David, BFM gave you major props on his site!

BillFitzmaurice.info - View topic - These guys seem to have an 18" loaded horn that works...

Ron K wrote: according to Tom Danley, Akabak models quite differently then Horn Response.

Bill Fitzmaurice wrote: It used to, but not anymore. Where response is concerned HornResp is now just about as accurate as Akabak, and is infinitely easier to use. Akabak offers some more advanced features, but McBean issues improved HornResp versions on average every six months, and I expect he'll eventually meet or exceed Akabak."
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Old 3rd May 2010, 10:30 PM   #1098
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Quote:
Originally Posted by BP1Fanatic View Post


Ron K wrote: according to Tom Danley, Akabak models quite differently then Horn Response.
Depends on how you use it.

I was able to get my results almost identical using akabak, before I realized that hornresp exports directly to akabak format!!
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Old 4th May 2010, 07:59 AM   #1099
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Hi BP1Fanatic,

Quote:
Originally Posted by BP1Fanatic View Post
Hey David, BFM gave you major props on his site!
Thanks for making me aware of Bill's comments regarding Hornresp. I think it would be fair to say that he started off as being somewhat sceptical of classical horn theory early on, preferring to use his own intuition and experience to develop new "ground-breaking" designs that seemingly defied conventional wisdom and theory. It appears though, that he has perhaps been "converted" somewhere along the line :-).

Quote:
Originally Posted by BP1Fanatic View Post
Ron K wrote: according to Tom Danley, Akabak models quite differently then Horn Response.
Hornresp and AkAbak use the same fundamental lumped-element loudspeaker model, as documented in the classic texts by Olson and Beranek - which means that results produced by the two basic models will be identical.

Differences do however arise in some situations because Hornresp uses either a plane or isophase wavefront horn model, depending upon the circumstances. Akabak uses a plane wavefront model in all cases, meaning that results can become less accurate once Cir exceeds 1. Also, Hornresp uses a more sophisticated directivity model than AkAbak, meaning that pressure response results will be different.

Power response results for simple horns in 2 Pi space having a value of Cir < 1 will be identical for the two programs, provided that the input parameter values are the same, and that the Hornresp results are calculated with resonances not masked.

AkAbak can simulate conical, exponential, and hyperbolic-exponential horns, whereas Hornresp can also simulate Le Cléac'h horns, oblate spheroidal waveguides, spherical wave horns and tractrix horns. Comparison with actual measured results has shown the Hornresp predictions to be reasonably accurate - they are certainly very useful for establishing an optimum design for a given loudspeaker configuration.

However, Hornresp will never be able to offer the absolute design specification flexibility that AkAbak has...

Kind regards,

David
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Last edited by David McBean; 4th May 2010 at 08:04 AM.
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Old 4th May 2010, 08:22 PM   #1100
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Quote:
Originally Posted by David McBean View Post
Hi BP1Fanatic,

Thanks for making me aware of Bill's comments regarding Hornresp.

Kind regards,

David
No problem guy! You deserve it seeing that most people on the different audio forums use your amazing product
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