56Kb phone modem PCI card?

[chrisalbertson90278@xxxxxxxxxxxxxxxx>]

Hi,

Before I go reading a bunch of "self documeted" source code,
to figure this out, does anyone here know anything about the hardware
found on your typical 56Kb phone modem PCI card?  A phone modem has
some pretty nice hardware on it.  An ADC and a DSP.  Most are flash
programable too.  It may also be possable to install two modems
in a PC

--- Kohjin Yamada <jr1ede@xxxxxxxxxxxxxxx> wrote:
> Hello Toki and All,
> 
> AK5394A sounds really great although...
> 
> I'm not an expert in this field though one who interests in more
> technical
> should read;
>
http://www.digitalaudio.dk/technical_papers/Tradeoff%20of%20192%20kHz.PDF
> 
> It summarizes;
> On the other hand the study of the technical specification of the
> AK5394A
> indicates that the S/N ratio decreases at higher sample rates as a
> result of
> the expansion of the frequency band. Actually the S/N decreases by
> more than
> 3 dB that one would expect as a result of a doubling of the sample
> rate from
> 96 kHz to 192 kHz.
> 
> So, what?
> 
> Kohjin - JR1EDE
> 
> At 12:18 02/11/20 +0000, toki wrote:
> >Hi OM.
> >
> >> Thanks to Pete, KC1HR I now know that there is an ADC
> >> chip CS5396 from (http://www.cirrus.com).
> >>
> >> This is a 24 bit 96kHz stereo AD converter and there
> >> is an evaluation board for it.
> >>
> >> The CS5396 is 20dB better than the Delta 44!!
> >
> >What does make you so happy ?
> >Almost every companies that develop ADC device have evaluation board
> >for their products.
> >
> >For example;
> >You can get information about evaluation board of the most advanced
> >AD converter from;
> >
> >     http://www.asahi-kasei.co.jp/akm/
> >
> >AK5394A is a 24 bit 192kHz stereo AD converter with s/n 123db.
> >The evaluation board also has printer, coax, and optic interfaces
> like
> >cirrus.
> >I don't believe the cirrus can develop better analog device than the
> akm.
> >
> >Anyway, problem is always the cost.
> 
> 
> 
> 


=====
Chris Albertson 
  Home:   310-376-1029  chrisalbertson90278@xxxxxxxxx
  Cell:   310-990-7550
  Office: 310-336-5189  Christopher.J.Albertson@xxxxxxxx

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