Audio Measurement Resources

Great idea!

Here are a couple of great references I use all the time.

Rane Specs
http://www.rane.com/note145.html

AP Audio Measurement Handbook (bottom of page)
http://ap.com/download/whitepapers

Mike

Here's a link to Tektronix 'XYZ of Oscilloscopes' - a good primer for CRO usage

http://socrates.berkeley.edu/~phylabs/bsc/Supplementary/Lab1/xyz_scopes.pdf

Just a note to say that Mike's original links have been moved here:

https://www.ranecommercial.com/legacy/note145.html
https://www.ap.com/download/the-audio-measurement-handbook-2/

I made this a sticky...
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I did co-author a book (with Larry Blakely) on performing audio measurements that we gave away free with the LOFTECH TS-1 audio test sets. Sorry I do not have a scan.

JR

Hi John

I have the book, do you want to scan it?

not really...

It was mostly accurate, probably a few minor errors in it that I forgot about over the years.

[edit- I don't care if somebody else wants to share it, I just do not have a scan of that, and lots of my other old scribblings... /edit]

JR

Audio1Man said:

Hi John

I have the book, do you want to scan it?

Click to expand...

As JR doesn't mind if it's shared could you please scan it and share it with us?

Thank you so much

What about a surface mount opamp in the tonearm, next to the cartridge? Probably been done already.

Whoops said:

As JR doesn't mind if it's shared could you please scan it and share it with us?

Thank you so much

Click to expand...

I do not care... I co-authored it with Larry Blakely (RIP, died back in August of this year) mostly to merchandise the Loftech TS-1 audio test set. It contained lots of basic procedures for things like setting up tape recorder bias and measuring frequency response.

CJ said:

What about a surface mount opamp in the tonearm, next to the cartridge? Probably been done already.

Click to expand...

There is an incentive to not add excessive mass to the tone arm. A cartridge manufacturer could add discrete JFET source followers inside the cart without much weight/mass penalty, and phantom power the active JFETs through the existing wiring (like cheap microphone capsules do now).

This could pretty much negate cable capacitance and sundry termination effects, but I do not see enough market demand for developing a novel technology for such a mature product category. I am too lazy to do a patent search to see if anybody has already pursued this.

JR