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-   -   What would you want to see in a book on electronics for vinyl replay? Douglas Self. (https://www.diyaudio.com/forums/analogue-source/300382-book-electronics-vinyl-replay-douglas-self.html)

DouglasSelf 7th December 2016 07:49 PM

What would you want to see in a book on electronics for vinyl replay? Douglas Self.
 
My publishers inform me that the 2nd edition of Small Signal Audio Design has reached the practicable limits for the size of a book. (It is 750 pages long) Perhaps it is as well not to write a book you can't pick up with one hand.

I therefore propose to split off all the material in SSAD2 on phono amplifiers and vinyl replay generally, add a bunch of new stuff which I have thought up since, and make it into a separate book.

This is some way down the line (next year at earliest) but I would be very glad to hear opinions on what the book should contain, especially stuff not currently in SSAD2.

rayma 7th December 2016 08:46 PM

Quote:

Originally Posted by DouglasSelf (https://www.diyaudio.com/forums/analogue-source/300382-book-electronics-vinyl-replay-douglas-self-post4910175.html#post4910175)
I therefore propose to split off all the material in SSAD2 on phono amplifiers and
vinyl replay generally, add a bunch of new stuff which I have thought up since,
and make it into a separate book.

A very good idea.

rayfutrell 7th December 2016 08:58 PM

I have the 1988 edition of Handbook for Sound Engineers (Howard Sams copyright) which has a chapter on phonograph reproduction. You might want to take a look at that book and see what is already covered.

jan.didden 7th December 2016 09:20 PM

I see a lot going on in vinyl replaying in these pages, especially on DSP supported RIAA eq. Some heavy hitters active there.
So I believe such a dedicated book should include these concepts for sure.

Jan

Bigun 7th December 2016 09:43 PM

If you want to be complete, you may want to look at the mechanical aspects of vinyl reproduction as they seem to be as critical as the electrical. I'm not sure if you are comfortable or expert enough to cover them or if a guest author for such a chapter in the book could cover that. But without the mechanical it might possibly be incomplete.

I don't know what is already in your small signal book, but there are other small signal analogue sources that folk are interested in - tape being the one that comes to mind.

billshurv 7th December 2016 10:25 PM

What I think is missing from publications I have seen is a section on calibration, by which I mean working with the limitations of the transducer to get a flat response (and alluded to in a response to you in another thread). As you pointed out there are variances side to side as well as between units and the blunt tools of a fixed resistance and variable capacitance are a recipe for peaky HF response.

And extending what Jan said, looking at the HF spectra of click, ticks pops and scratches to see what can be done to reduce those in preparation for A/D conversion is another area that has little coverage in current publications.

Bigun 8th December 2016 01:05 AM

Quote:

Originally Posted by billshurv (https://www.diyaudio.com/forums/analogue-source/300382-book-electronics-vinyl-replay-douglas-self-post4910324.html#post4910324)
click, ticks pops and scratches to see what can be done to reduce those in preparation for A/D conversion is another area that has little coverage in current publications.

That will be best solved after A/D conversion, in the digital domain, using a Deep Learning algorithm. But that's like removing the burnt taste from a BBQ, why would you want to ?:cool:

billshurv 8th December 2016 01:09 AM

Deep learning? What is that and why would we need it?

bondini 8th December 2016 06:59 AM

A compendium/summary of fundamental electro+mechanical information, perhaps?
 
If a book on vinyl replay included a handy compendium of fundamental electro+mechanical information, maybe I could retire my shelf-load of papers and articles. Less time rummaging through Van den Hul’s FAQs, Peter Copeland’s excellent “Manual of Analogue Sound Restoration Techniques”, less time hunting for that Shure technical note by Happ, wondering where I’ve put Ladegaard’s B&K application note ... you get my drift.

I would echo Bigun’s request for a systematic treatment of the mechanical (and perhaps electro-mechanical) aspects of replay. My wish-list would run to the fundamental physical principles of and actual measurements of the:
Mechanics of platter drive, including speed accuracy/variation, perhaps by drive type (idler, belt, DC direct drive, AC direct drive)
Mechanics of the tonearm, including alignment, and resonance
Mechanics of the stylus and groove, including the interaction of groove and stylus types
Electro-mechanics of cartridges, including fundamental principles of mono and stereo transducers, and a survey of motor types (moving coil/magnet/iron) and
Vibration and noise isolation and control (plinth, platter, plattermat, tonearm and cartridge)
This is all very much in the mechanical domain – maybe Bigun’s suggestion of a guest author has merit?

Shaun 8th December 2016 10:07 AM

I would say:

(1) how to determine the noise characteristics of op amps and discrete amplifiers & various associated topologies
(2) how to determine when to choose a current amplifier or voltage amplifier
(3) how to model/design a compensation curve (RIAA)
(4) how to determine correct loading of a cartridge
(5) how to evaluate dynamic range of a phono front end


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