John Curl's Blowtorch preamplifier part II

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kgrlee, sorry for your audio files, can't listen them, i have only stereo systems, at home.
VVMic for TetraMic | vvaudio.com can turn these into any coincident stereo microphone arrangement at the original mike position. Small application, very easy to use, great fun and very high quality.

Use it to try your favourite microphone arrangement(s), any pattern(s) from omni to fig-8, point them around, even an effect like moving the microphone.

Because a TetraMic or a captures the complete soundfield at the original position, it is often used so the recording engineer can decide what type of mike to use for the final mix AFTER the event in post-production.

Also Harpex which is much fancier but not better quaility.

BTW, IRCAM have at least 2 of my mikes and produce quite a lot of stuff about Ambisonics.
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However, these test systems will NOT really teach us EVERYTHING about what we need for better audio design, until they add FM distortion to their features, and perhaps Hirata distortion as well, and hopefully we will find even more distortion mechanisms that our ears are often designed to detect, yet we have no measurement for them, as of yet.
Presumably, someone will conduct Listening Tests to show the relevance of these new distortion mechanisms. :)

Remarkable how natural selection has evolved homo sapiens into homo auric pinnae. :D

I first met M. Otala at AES Hamburg 1981(?). It was my first solo AES paper so quite an experience for a young lad. One of his students presented an excellent paper which showed conclusively the zillion V/us signals Otala postulated NEVER occurred.

Otala wasn't fazed at all. I made the mistake of trying to drink the Professor under the table on Gin & Tonics. As we both slid under the table, he confided to me that PIM would be the next fashion in amp distortion. :eek:
 
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Kgrlee, please take Ron Quan and me on with your criticisms. Otala is out of the race, as you well know. I PROVED in high slew rates possible, generated by MC phono cartridge mistracking and this was put into the 'critique' to Bob Cordell in 1980, published here somewhere.
 
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A Rerun but;
can we make a new ambisonic coder/decorder circuit from original schematic? ... with updated circuitry. ??? Something many can then afford to make and use. It's the best thing we have and it was too expensive in original form.

Who has/ where is the schematic to post here?
 
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Team SY? What team? Dick Sequerra was a close friend to Scott Wurcer for a long time. Dick thinks that Scott is a very good engineer, and that the AD797 is a GREAT product. However, Dick, like me, is suspicious of global loop feedback, so he designed a preamp that did not use global loop feedback, yet used the AD797. Quite a feat!
I just sent Dick a copy of Ron Quan's paper. I hope to get some feedback from him soon, about the paper. You would do well to keep and open mind on this subject, too.
 
Wouldnt have anything to do with radiation/polar patterns, would it?

Yes. In different environments.

All this blind testing talk reminds me test drive of all types of cars and tractors in some chosen environment, either freeway or corn field, chosen blindly.

...and best car for the millennium: with boat body, rear propeller to swim, and upper propeller to fly like a helicopter.
 
If these were properly conducted Blind Listening Tests, I'm VERY interested as I've designed some nice but unconventional dipoles too. Any references / links?

Search for BAF on this forum.

Edit: And yes, they were properly conducted. But I doubt they were "blind" for such experienced designers like Nelson Pass and Siegfried Linkwitz, they must know well what would sound better between that walls. ;)
 
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I PROVED in high slew rates possible generated by MC phono cartridge mistracking and this was put into the 'critique' to Bob Cordell in 1980, published here somewhere.
Anyone got any links?

I have great respect for Guru Cordell though I think some of his stuff is too complicated. But I'm the guy sipping meths while yus are drinking 1st cru Burgundy. :mad:

BTW, the student's AES paper did show MC mistracking was the worst case but again no zillion V/us.

I won't go into evil digital, SACD etc cos I know what microphones give out and on what type of sounds. But there's always evil electronic generated sounds .. :eek:
 
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Great mic for recording

VVMic for TetraMic | vvaudio.com can turn these into any coincident stereo microphone arrangement at the original mike position. Small application, very easy to use, great fun and very high quality.

BTW, IRCAM have at least 2 of my mikes and produce quite a lot of stuff about Ambisonics.
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This is great! With a portable/small digital recorder and software, it can be a lot less expensive than original Ambisonic system. Thx - RNM
 
And yes, they were properly conducted. But I doubt they were "blind" for such experienced designers like Nelson Pass and Siegfried Linkwitz, they must know well what would sound better between that walls. ;)
Alas, these buzz words disqualify these from being pukka data according to the Dynamic Duo, Lipsh*tz & Vanderkooy and even me. :mad: But I'll have a search as some dodgy data is better than no data. [deleted] .. 2 pages of statistical mumbo jumbo bullsh*t ... [/deleted]

PS The latest scandal is that some other Golden Pinnae prophet has proposed, at the recent AES SF, a new test that puts Mr. Pass's designs in the same class as uA741. I haven't tested Mr. Pass's designs but I do have reliable Blind Listening Test results that show uA741 is unacceptable on piano music & other stuff. :D
 
There is a progressing difference in tests for op amps. First, might be harmonic distortion, then TIM, then FIM. Each is different from each other, and only partially related. We do NOT do this to sell ideas. We have plenty more to do than that. We do it to IMPROVE audio quality to the best that is possible (once we find out how to do it better)
We have spent man-years with real salary or support to research TIM and now FIM. We do it to learn what is important, AND once WE prove something, everybody else comes up to speed, so to speak. It is the way of things.
 
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