On Friday 23 November 2007, Bill Unruh wrote: >On Fri, 23 Nov 2007, Gene Heskett wrote: >> On Friday 23 November 2007, Vladimir Mosgalin wrote: >>> Hi Darrell Bellerive! >>> >>> On 2007.11.22 at 17:54:19 -0800, Darrell Bellerive wrote next: >>>> I have never been happy with this card. While it works okay for playing >>>> basic sound, getting it to do anything more sophisticated is pure black >>>> magic. For example, I have never gotten full duplex to work. >>> >>> Well now, when pulseaudio era came, hopefully it's not true anymore. >>> >>>> 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. >>> >>> How does that matter when all is needed is digital output? >>> >>> Anyway, in analog mode, are you sure there is no option to switch off >>> bandwidth filter? >> >> No one in their right mind would want to do that as the aliasing would >> drive you up a wall. The other delay distortions the filter might give >> are 100's of times more tolerable to listen to. > >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'm 73, and my ears aren't in that good a shape. The last time I was tested I had a Carhart notch over 120 db deep at 4 kilohertz, rising back up to about 15 db down at around 7khz, and another notch at 15.735 khz about 40 db deep, but then I was the CE at a tv station for around 30 years, with 10 to 25 monitors in the control room, all screaming at or about that frequency, you can hear the doppler shift as the satellite carrying the signal wanders around in it box in the sky, and it was back up to about -20 db at 22 khz. I can still hear that stuff very plainly as I also have many years of using SSB on chicken band radio where cheap filters let a lot of the opposite sideband thru. So if those badly worn ears can hear and identify it, pity the child who hasn't yet worn out 3 centerfire rifle barrels before he figured he'd better be wearing some earmuffs. That BTW is the cause of the Carhart Notch.
>------------------------------------------------------------------------- >This SF.net email is sponsored by: Microsoft >Defy all challenges. Microsoft(R) Visual Studio 2005. >http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ >_______________________________________________ >Alsa-user mailing list >Alsa-user@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/alsa-user -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Mix's Law: There is nothing more permanent than a temporary building. There is nothing more permanent than a temporary tax. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
