John Curl's Blowtorch preamplifier part II

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Slightly OT

Send it to CMU I send all my stuff to the MIT EE dept.

Scott, where should I look for discontinued ADI stuff? Can you point me into right direction i.e. name a few reliable sources/companies? I'm in the need of a few ADMOD79 modulators, but only usual far eastern dealers are offering them. Given the number of other fakes floating around, I don't want to buy anything there..
Thanks,
 
Only a secret to those who don't know what the phrase "Search this Thread" means

I know what it means. But there are a lot of posts with "Porsche" in them and it only shows a small portion of the post so you have to pull up the full post to see if what you're looking for is in there. Since John was posting on the thread at the time, I figured it would be faster to just ask.

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I do wish we would all stop attributing better 'low level information retrieval' to anslog, and especially LP. The way people talk around here, you would think we were talking about 8 bit D-A's.

People like the sound of LPs because there's lots of low order distortion. It's euphonic. Period.

The clicks, pops and swish of the stylus on the groove side walls is nostalgic - it appeals to old farts. The only reason youngsters are trying vinyl is out of incredulity.

LP will never beat the low level data retrieval of a reasonable digital play back system.

Nevertheless, I also like LP - provided I put my rose tinted glasses on before the stylus hits the groove.
 
LP in top notch form is remarkable to listen to - it's understandable why people pursue getting that little bit more from the medium; and I've been in situations many times where the vinyl playback was way superior to the digital - CDs, and was especially so in the past, easily fall into a hole where they're dreary, dull, boring to listen to - this is faulty playback, and because it's not obviously a fault it's accepted as part of the characteristics of the medium ...
 
Being one of those old guys who still has albums and a TT I have to admit that the low level details from a great recorded CD is far cleaner with many more low level details available. The problem comes in when all digital is thrown in the mix as all being equal. First off it doesn't matter how much detail you can get it the transfer to digital is poorly done. I think anyone who is honest will admit they have heard terrible digital recordings. no different than a lousy vinyl recording. garbage in garbage out. Besides that you have low resolution MP3's that just sound bad to me no matter what, I just dislike the sound of low resolution MP3 sound. Do I have to have 24bit/ 96Khz or above to have a great sounding recording, not really. After that you have your single bit vs multi-bit playback, different D/A converters and no oversampling vs high rate oversampling. There are so many variations that to make blanket statements about digital sound is just as disingenuous and the difference of a high end phono system and a simple all in one record changer. Simple statements just make the whole argument impossible to make any real conclusions.
 
I do wish we would all stop attributing better 'low level information retrieval' to anslog, and especially LP. The way people talk around here, you would think we were talking about 8 bit D-A's.

People like the sound of LPs because there's lots of low order distortion. It's euphonic. Period.

Actually a lot of the commonly attributed sound and noises involved in LP playback are related to the mechanics of playback, the poor approaches to the cartridge design and electronics.

The first thing you notice when listening to properly reproduced vinyl is none of that nonsense is present. This is the most surprizing observation from people used to the bad old days of the record.

And as for getting digital's signal resolving capabilities backward... This is not my experience.

John's question was what else could be going on with Vinyl playback, I answered based on my experience. I'm lucky enough to have a very good vinyl front end and a 40 year passion for refining it. I'm not wearing rose colored glasses.

Regards, Mike
 
Again, the good news is that what has been captured in recordings, analogue or digital, 'good' and 'bad', is truly remarkable - in a positive sense ... there is still some way to go before a 'normal' system, assembled without thought, retrieves and reproduces that to anywhere near what is possible, in quality terms ...
 
I have successfully fooled listeners when I added a recorded empty groove noise to a CD track and added some crosstalk, plus a retro exciter mastering function. None has realized it was a digital with added 'analog' attributes.

This one will do as well.
What's still missing is 'Pressing' knob - British, US, German, Audiophile, MFSL, Asian bootleg, East European bootleg and so on :devily:

An externally hosted image should be here but it was not working when we last tested it.
 
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Hey John, once again this thread moves at lightening speed so this is ancient history, but I wanted to respond.

From my offbeat experience, the ability to resolve low level detail is what makes the difference here. Analog recordings have the capacity for an incredible amount of low level information to be encoded into the grooves. Its only with the current hi-rez digital that some of the information buried deep in this underestimated part of the envelope is being retained.

There are so many clues as to the importance of this that I'm surprized that more attention has not been put into understanding how well circuitry resolves the fine stuff in the presence of more dominant signals! Most measurements excercise the circuits at the performance extremes.

Past resources available to listen deep into the music have been to turn the volume up to bring out the lower level detail, often with less than pleasant results. There is quite a bit to be learned by listening to the integrity of of music buried in the background, The stuff supporting all of the front and center aspects of a recording. The cool thing about analog is that the signal is intact and there is the capability to resolve information often below the noise floor and around it's artifacts. So the information is there.

Digital is reassembled analog and it historically scrambles and introduces odd noise signatures in this portion of the dynamic spectrum and maybe it all doesn't quite all fit together as well. Obscurring the low-end of the spectrum turns the music flat and uninvolving

Just some thoughts from the cheap seats. Mike

This has been my observation too, poor arm/cartridge alignment creates groove noise, well worn Lp's aside.

I do wish we would all stop attributing better 'low level information retrieval' to anslog, and especially LP. The way people talk around here, you would think we were talking about 8 bit D-A's.

People like the sound of LPs because there's lots of low order distortion. It's euphonic. Period.

The clicks, pops and swish of the stylus on the groove side walls is nostalgic - it appeals to old farts. The only reason youngsters are trying vinyl is out of incredulity.

LP will never beat the low level data retrieval of a reasonable digital play back system.

Nevertheless, I also like LP - provided I put my rose tinted glasses on before the stylus hits the groove.

Hilarious B .... :)

I have successfully fooled listeners when I added a recorded empty groove noise to a CD track and added some crosstalk, plus a retro exciter mastering function. None has realized it was a digital with added 'analog' attributes.

Fantastic, retro exciter mastering function , added crosstalk , you may have just saved digital .. :)
 
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Another question for the peanut gallery. Why is it that virtually all old concert halls have good to great acoustics but many modern concert halls do not?

Oooh :D

Dare I venture to say that the "modern" have had (or tried to have) the imperfections ironed out "by design", in much the same way that many amplifiers try and have the imperfections ironed out by design.

Put bums on seats and say "listen ?" and what do folk prefer... in both cases :D

Just my thoughts...
 
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