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Old 21st April 2008, 06:29 AM   #61
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Join Date: Jun 2007
Default HORNRESP VERSION 19.10

Quote:
Originally posted by David McBean
Please note that it is quite okay to run multiple copies, provided that they all have the same version number. The important thing is not to edit, add or delete any records while the multiple copies are running.
Hi Oliver,

I have done some further testing and found, contrary to my earlier comment above, that it is really too risky to allow multiple copies of Hornresp to run, under any circumstances. Adding or deleting records in the first copy before the second copy is opened, can lead to all sorts of unpredictable outcomes. If the two copies happen to have different version numbers, then the potential problems are even worse.

Hornresp Version 19.10 safeguards against any inadvertent corruption of the data file in this fashion by allowing only one copy of Hornresp to run at a time.

Also, from Version 19.10 onwards it will no longer be possible to open the Hornresp.dat data file if it has previously been opened by a more recent release of the program. This should also assist in preventing inadvertent corruption of the data file, going forward.

Thanks for raising the issue - you have helped to make Hornresp a better product :-).

Kind regards,

David
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Old 21st April 2008, 09:54 AM   #62
Jmmlc is offline Jmmlc  France
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Hello Lars,

As an example of compression driver simulation under HornResp you'll find in that link, my simulation using the TAD TD2001:

http://www.audioasylum.com/forums/hu...12/128658.html

Best regards from Paris, France

Jean-Michel Le Cléac'h

Quote:
Originally posted by revintage
Hi David,
How do I simulate a horn with a compression driver, in my case JBL 2441 ? Have checked your help and googled but haven´t found anything.
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Old 21st April 2008, 10:10 AM   #63
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Hello Jean Michel,

Thanks for the link, very interesting. Funny, I had your or the kugelwellen horn in mind. Wanted to do a 180Hz horn as this seems to be the flare of the short horn in the driver. My intention was to try it from 300Hz.

I have used your spreadsheet and another KW-spreadsheet for calculations. Was interested in a simulation just to verify.

As I mentioned in another post I have found data for the 375 in an AES-paper by Geddes but the area and volume figures do not make sense.


Brgds
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Old 21st April 2008, 06:59 PM   #64
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These are the of the JBL 375. Anyone who cares to translate to metric?
Attached Images
File Type: jpg 375-data.jpg (79.0 KB, 1131 views)
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Old 22nd April 2008, 11:47 AM   #65
Jmmlc is offline Jmmlc  France
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Default Re: HORNRESP VERSION 19.10

Hello David,

Do you know this new software

http://www.djgroundbass.com/HyperHorn.html


Best regards from Paris, France.

Jean-Michel Le Cléac'h
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Old 23rd April 2008, 05:40 AM   #66
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Default Re: Re: HORNRESP VERSION 19.10

Quote:
Originally posted by Jmmlc
Hello David,

Do you know this new software

http://www.djgroundbass.com/HyperHorn.html


Best regards from Paris, France.

Jean-Michel Le Cléac'h
Hi Jean-Michel,

No, I was not aware of this new software - many thanks for bringing it to my attention.

It looks very interesting, although it does not seem to be available for download just yet - at least it wasn't when I tried.

Kind regards,

David
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Old 15th May 2008, 07:11 AM   #67
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Join Date: Jun 2007
Default HORNRESP UPDATE

Hi Everyone,

Just letting you know that I have released yet another minor update to Hornresp. The change does not justify a new version number, but the product number is now 1910-080515.

Change Details: Typically when developing a loudspeaker system, Hornresp users tend to start with a base design and then iterate and refine from there. In the past, when a record was edited and a new record then added, any changes made to the old record could either be saved to both the old and new records, or not saved to either record.

With the new release, when a record is edited and a new record then added, any changes made to the old record can either be saved to both the old and new records, or just to the new record only.

This means that it is now much easier to generate and preserve a series of iterations leading from the base starting design to the final system specification. In other words, it comes in handy if you wish to maintain an “audit trail”, documenting the evolution of a particular design project over a number of records.

On another issue, a number of users have asked me to explain the significance of the Hornresp product number. It simply represents the version number with the point separator removed, followed by the software release date in year / month / day order. For example, the current release of Version 19.10 was uploaded on 15 April 2008. This means that the product number for this release is 1910-080515 (format is vvvv-yymmdd).

At the moment the product number can change quite frequently, sometimes almost on a daily basis. I am continually tinkering with the code looking for ways to further refine and improve the program. Sometimes the change may not be apparent to the user, but in other cases it will be quite obvious. Please note that most of the changes are now related to the operation of the context-sensitive user interface, and the elimination of very subtle bugs and logic errors that I still manage to find from time to time. Very few changes are being made to the actual simulation models used in the program.

Incidentally, if anyone does come across a bug or “unexpected outcome” while using Hornresp, please do not hesitate to let me know, as I greatly value such feedback.

Also, I would be very interested to learn if Hornresp works with the new Vista operating systems (32-bit and/or 64-bit). Unfortunately I only have access to Windows XP myself.

Thanks in anticipation for any information.

Kind regards,

David
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Old 15th May 2008, 07:14 AM   #68
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Once again, thank you for your great effort and this nice peace of software!
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Old 15th May 2008, 07:22 AM   #69
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Thanks Sabbelbacke :-).

Kind regards,

David
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Old 27th May 2008, 07:40 AM   #70
Jmmlc is offline Jmmlc  France
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Dear David,

After I send with the message

http://www.diyaudio.com/forums/showt...48#post1520648

a graph with simulations performed under Hornresp that allow to compare the response of different type of 160Hz horns (exponential, hypex, tractrix, Le Cléac'h, ...) to the response of the waveguide having the same length and mouth diameter than the exponential, Earl Geddes wrote in that message:

http://www.diyaudio.com/forums/showt...13#post1520813

that the simulations given by Hornresp for the oblate spheroidal waveguide "are wrong".

Well, I would just let pass the information...

Best regards from Paris, France


Jean-Michel Le Cléac'h
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