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I should not even stress more that I do not like people at DIYAudio.com. The domination majority of them incredible idiots and the brightest among them… do not really have any perspective what audio is all about. I do admit that in some seldom cases they have some seldom interesting posters among them…. but those people do not see subjects in content in context of DIY Audio…

Anyhow, it was pointed out to me that the deaf and senseless Morons from DIYAudio discussed the use of HornResp and mocked my position of rejection the HornResp modeling as a useful tool. I do like when the cretins with understanding of audio at the pathetic level of Fitzmaurice are trying to make opinion about the subjects that they do not understand. Why a blind person does not advise a painter how to draw the world?  Reading the comment of the idiots from DIYAudio (practically on any subject!!!) I always feel that those people are characters from Tchaikovsky’s Iolanta opera. The Iolanta was daughter of a King Rene and she was born blind. Her father made the Iolanta’s family and everyone on his kingdom do not tell Iolanta about her blindness and about the entire idea of light and sight. The very same with DIYAudio morons – they massage the worthless topics (like how to use HornResp) but their efforts have as much relativity of the actuality of Sound as the Iolanta’s thoughts about the colors of roses.

Among, many worthless posts on the subject in the DIYAudio thread I came across a very good one - surprisingly it was by Earl Geddes. Earl is usually at anti-horn position and he typically uses horn disinformation to promote his idea or waves navigation and eventually to sell his products – nothing unexpected. Still in context of the purposefulness of the HornResp the Earl comment was very accurate:

Earl Geddes wrote:

Having done a good deal of horn modeling myself, I will say that there are areas where its easy and areas where its difficult to impossible. Modeling a horns impedance and its load on the driver is the easiest part. Thats because the Horn Equation is basically an impedance equation - it is one dimensional. But the true wave motion is three dimensional and as such any aspect of the horn that requires a good knowledge of the three dimensional aspects will be poorly represented by any model based on the Horn Equations - such as Hornresp. In practice what does this mean? The simulations will be very good for impedance - as shown above - good for the very low frequencies where the wavelengths are much longer than the horn dimensions, but they will likely fail miserably as the wavelength starts to become comparable in size to the actual device. That said, it turns out that virtually all contours act the same when the wavelengths are very large - only minor differences occur in the loading and the response. This is true for just about any contour with the same throat and mouth area and length. The connecting shape just doesn't matter that much. And where the shape does make a bigger difference, the Horn Equation is no longer accurate. Horn design is a tough nut to crack.

The Earl comments were very accurate but not describing the problem in full. There are many-many other aspects of Sound reproduction by horns that could not be modeled. Tone for instance. How the hell anyone is able to observe tonal changes during the horn equalization with a stupid and ignorant software? Tone and quality of tone is a language itself and it has no algorithmable properties. No one knows where Tone comes from in audio. Well, we might know where it comes from but we have in audio very-very difficult time to control tone. There are many y other characteristics that are superbly important (like depth transients EQ, harmonics, compression, distortions with volume, proximity to the “horn choking”, type of the high pass filter, different types of damping  etc…) that are completely not handleable by modeling software. So, what modeling software can actually do? As Earl said – juts to calculate sound pressure – nothing more – good enough for DJ and good enough for the simpletons who are on their brain-hunting journey at DIYAudio site.

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