Vinyl/CD

[Martin Czech]

> > And the digital signal chain will sound brighter, since it really goes
> up
> > to 20kHz, this may be too bright for some listeners that are used 
> > to "darker" analog recordings. There is a lot of habit in there.
> > This is described as digital cold then. 
> > 
> 
> I don't know why but I find that bright high sound (high frequencies) a
> bit noiselike. When you open a lowpass filter the signal in a synth, digital
> or analog, seems to by buzzy bright like high pitched noise. I know they are
> just overtones but they seems unnatural to me. But when I listen to a freq.
> mod. signal o, you can say a metallic/gong sound the bright sound does seem
> more natural.
> 
> Maybe someone who has some psychoacoustic explanation?
> 
> Paul van Nugteren
> 
> Yep we're humans, and ns are subjective.
>  

There are experiments that show that a high number of dense sine
frequencys (over some critical density) sounds like noise, but it
is certainly not noise, but deterministic. But the ear doesn't
know ... ;->

This is also the case for the higher partials of, say a saw wave.
High density. 

Some FM patches have wide partial spacing (high modulator ratio).
This may be under the critical density then.

Above some 15kHz the recognition of pitch is lost.
Your hear something, but you can't tell if it is noise
or deterministic. It's just something bright.


m.c.