[LAD] detailed spectrum for wide freq range

[Andrew Gaydenko]

On Friday 12 March 2010 20:08:02 fons at kokkinizita.net wrote:
> On Fri, Mar 12, 2010 at 03:42:27PM +0300, Andrew Gaydenko wrote:
> > The idea (under discussing at some of russian DIY audio forum) is to use
> > multitone signal, compare it before and after audio amplifier and (having
> > such *multiple* results for *different* amplifiers) to try get some - at
> > least partially useful - correlation between results and subjective
> > audio perceptions (in particular, "clearance" - don't know an
> > appropriate English term; it's about how easy different instruments can
> > be "separated" in brain).
> > 
> > I'm not sure it is a right way, but would like to take participation in
> > the experiment (especially with my last SE-invention :-)).
> > 
> > Fellows (using appropriate software analyzers under MS win) show very
> > clear spectrum plots for original multitone signal (ten -20db tones in
> > 20Hz - 20KHz range). Having single-boot Linux, I'd want to get something
> > the same :-)
> 
> What are the frequencies (in particular the lowest ones) ?
> 
> Ciao,

Just now that forum is under hosting changing process, so in hands I have 
multitone example wav file only. Sonic-visualiser shows approximately:

20 43 93 200 430 930 2K 4K9 9K3 20K

20, 200, 2K and 20K are exact values (I just remeber them :-)).


Andrew