Re: [Alsa-user] =?iso-8859-1?q?=22best=22_card_for_=22bitperfect=22_S?= =?iso-8859-1?q?PDIF_I/O=09with=09external_clock_sync_=3F?=

[Darrell B. <drb...@ya...>]

On Friday 23 November 2007 10:35, Bill Unruh wrote:
> On Fri, 23 Nov 2007, Gene Heskett wrote:
> >> On 2007.11.22 at 17:54:19 -0800, Darrell Bellerive wrote next:
> >>> Also while the Audiophile 24/96 does sample at 96 KHz, the audio
> >>> bandwidth of the card is limited to 22 Hz to 22 KHz +/- 0.4 dB.
> Of course there is no aliasing problem at sampling at 96K and having the
> frequency go up to 40K. There is an aliasing problem if you then
> downconvert that to 48K or 44.1K but surely the downconverter should handle
> that not the soundcard. Mind you why you want more than 22K I have no idea.
> For sound sources, that is all that you can hear. (NOt me, my ears are old
> and have trouble with 10K, but if you have little children they might
> appreciate the extra few KHz, but probably not since they already have to
> tune out that annoying 15.7KHz scream from the TV.

I use the audio card as a spectrum analyzer for electronics work. By mixing 
radio frequency (RF) signals down to audio frequencies, one can look at a 
section of the RF spectrum. For some tests, the wider the bandwidth the 
better.

Baudline, a great audio analyzer application, will handle sampling rates as 
high as 192 kHz. An analog channel that was flat from 0 Hz to 96 KHz would be 
wonderful. Not to mention a card with a very low noise floor, excellent 
dynamic range, and extremely low distortion.

Now if only such a sound card existed .

-- 
Darrell Bellerive