In article ,
Sumatriptan wrote:
Good morning experts ;-)

I've been going through my HFN test record. Most of it makes sense but I
don't understand my pink noise results. They show an approximate 10 dB /
decade tilt, which is what I would expect from pink noise. For example,
here's a frequency analysis of a 'perfect' pink noise sample generated
by Audacity.

http://www.nu-ware.com/Misc/Screensh...nk%20Noise.png

Here is the result of the HFN pink noise test using my M55E cartridge.

http://www.nu-ware.com/Misc/Screensh...nk%20Noise.png

However, when I look at test results around the web I see essentially
flat curves from pink noise tests. Like this:

http://www.tnt-audio.com/sorgenti/shure_m97xe_e.html

So, what am I missing?

I'd say it's likely impossible to record perfect pink noise to vinyl.

The peaks you're seeing above 10kHz are likely down to the capacitance of
the connecting leads. If you try a different type, you'll likely see a
different result. Not quite sure of the theory behind this, but it's what
I've experienced with variable reluctance cartridges. Perhaps an expert
would explain it?

--
*It's o.k. to laugh during sexŒ.Œ.just don't point!

Dave Plowman London SW
To e-mail, change noise into sound.