At 07:01 PM 4/22/2003 +0000, you wrote:
>agree. As far as I know, there is no evidence, that humans can
>hear sounds above 20 kHz at all. The only argument for sample rates
>higher than 48 kHz seems to be, that the cutoff-frequency of the
>anti-aliasing filter would be not so close to the highest signal
>frequencies (and the low-pass filter can be less steep). This could
>prevent some potential distortions at these high frequencies. I have
>the impression, that many manufacturers of consumer products use the
>new 24/96 or 24/192 capabilities for marketing reasons only (large
>numbers sell). I recently tested the new SoundBlaster Audigy 2
>soundcard, that claims to be able to record at 24/96. It turned out,
>that this card was unable to record any sounds at frequencies above
>24 kHz. The 192 kHz playback mode was able to reproduce signals of
>up to 80 kHz, but there was an incredible noise floor at these high
>frequencies. I returned that useless card....
>
>Raimund
Raimund (and before Walt gets going again):
We have discussed this almost to death previously on this group for over
two years.
We who have been using ATRAC 4 to record, very often quiet sounds nearly
masked by loud sounds, have been later able to filter out the loud sounds
(like the usual rooster crowing near the mic) and have been pleased to find=
our quiet sounds still there as if recorded by DAT or R-R tape. So we keep=
doing - using MD.
But, there is much evidence that human ears use arrival time differences
down to even a few microseconds (see my references previously to
Batteau). Again, this is the "nth" go around for many of us on this
group. I claim digital samp[ling in general does a lousy job at preserving=
arrival times accurately on sibilant sounds or sharp ringing sounds like
rain spattering or jingling keys. I disagree with Walt on this one, I
think it IS worth using much higher rates, as you and Dr Kaernbach have
suggested, especially for acoustical research.
my best regards,
Marty Michener
MIST Software Associates PO Box 269, Hollis, NH 03049
EnjoyBirds.com - Software that migrates with you. http://www.EnjoyBirds=
.com
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