🚀 go-pugleaf

Hi,

I have (attempted) implemented DSP filtering using a PC and two sound cards
under DOS - no real operating system overheads. Big problem with using
multiple sound cards is that they all have individual clocks, and may drift
relative to one another. My sound cards, both sound blaster but about 4
years between them, have a clock error of about 1%, quite significant if
your output overtakes your input.

If you do proceed this way, creative had quite a bit of info on programming
their sound cards.

James.

"Adam Seychell" <aseychell@vet.com.au> wrote in message
news:21a524b0.0203252126.7e2b7297@posting.google.com...
> What are you tying to achieve. A complete active digital speaker
> system or a some type of tooling for developing crossovers ?
>
> I've done some sound card programming under Windows using MAPI and all
> in C. Its kind of horrible stuff to learn, and I wouldn't like to try
> it on multiple sound cards. Stick with the DSP board, that way you
> fill your heard with a lot more useful stuff.
>
> I'm interested in how you plan to design the crossovers.  Will you
> measure the frequency response of each individual driver and synthesis
> an FIR to obtain a flat frequency response transition between the two
> drivers ?
>
>
>
> john_wr100@yahoo.com (Johnny) wrote in message
news:<3c9f0323.29265355@news.optusnet.com.au>...
> > On Sun, 24 Mar 2002 15:21:27 +0000, zeus@myth.demon.co.uk wrote:
> >
> > >Wouldn't it be infinitely easier to use a PC and write the software to
> > >use a Soundblaster live or something? With the Pentium 3, Pentium 4
> > >and AMD extensions, they can pump out plenty of DSP-alike horsepower.
> > >MP3 players like Winamp with stereo equalisers only take about 2% of
> > >the cpu time on my P3-550.
> > >
> > >Mike
> > >
> >
> >
> > Maybe it is, but I dont have any background in PC software.  I never
> > had do deal with operating systems, and am not sure I want to start.
> >
> > It seems like there is a lot of stuffing around with buffering and
> > latency problems with modern OS.  I figure a DSP chip that can
> > itegrate directly with the codec should have less timing problems, and
> > possibly(!) better sound.
> >
> > If you can tell me where I can get documentation about the drivers for
> > sound blaster cards and how to access them with my Borland C++
> > compiler (which I never used) I would be very pleased!  I have really
> > got no idea about this.  I only ever worked with embedded systems.
> >
> > Isn't it complex to use multiple sound cards at the same time, or
> > would you  recommend a multichannel card.
> >
> > kind regards,
> > John.