🚀 go-pugleaf

Andr� Huisman wrote in message <75o437$sci$5@news2.xs4all.nl>...
>Chung heeft geschreven in bericht <367f4153.21340362@news2.cyberec.com>...
>>>who's to say the book in itself is corect? otherwise why would people
>>>bother with 96khz or hdcd and all that?
>>>
>>>kent
>
>>Good point...!!!   Kent........I belive my ear more than the theory.
>>I Hate argue with them.  They belive theory more than ear.
>
>
>Then do Arny's bittest. It does not say much about bandwidth (hey Arny, make
>a Bandwidth test as well ;-) but it does say much about the necessity for
>more than 16 bits.

Actually, doing some tests of sharp cutoffs below 20 kHz has some romance to
it.

In my foggy thinking, I've always thought that doing this sort of thing would
only make sense if the system bandpass were > than 22 or 24 kHz, and I was
just biding my time until 24/96 stuff gets more generally available. FWIW, I'm
told that after the new year, 24/96 stuff will be a lot more readily availble.
I've been testing a 24/96 DAC (seems to be very fine) and a card with 24/96
digital I/O over the past month.

However, doing some CD's with the bandpass knocked down in steps of 1 kHz
would have some romance. If I get some time over the holidays...

>You can make such a CD (using software like Cool Edit) yourself. It's only
>then that you can start to "believe" your ears (after you've experienced
>that they are pretty easy to fool).

Exactly. Just DAE a track off a CD that seems to have lots of nice high
frequency program material, and fire up Cool's FFT-based filter. BTW, this is
one amazing little feature of CoolEdit - if you type in the right numbers, you
get (by analog standards) incredible slopes and incredibly smooth bandpass.
The FFT fiilter seems to work on magnitude and leave phase alone. If you have
CEPro, they add "scientific" filters where you can define phase and amplitude
separately and arbitrarily.

Got any suggestions for program material you think would be good for this?


>If I have the time (next year ;-) I will make a CD of my own (according to
>Arny's suggestion) but will add different Bandwidth's as well (starting from
>say 12kHz upto 20kHz). Would be a nice Christmas present for High Endies
>;-))


I may get there first! ;-)