Marsh Parker wrote:
> This may seem like a dumb question, but I know the sound card does the
> A/D and D/A conversions.
> Are there any DSP functions in the sound card? And if so, how are
> they accessed and there must be some "standard" interface for the
> various sound cards??
>
> Marsh, NC7V
Marsh,
as you say, the only functions provided by the sound card are the
conversions back and forth between the analog and the digital realms.
Sometimes it is possible to read DSP advertised on some sound cards.
In such cases DSP means "Digital Sound Processor" and not "Digital
Signal Processor"... those chips are mainly used for the handling of
MIDI, to synthesize musical sounds starting from wave tables, and/or
to add special effects as reverber, echo, etc..
When talking of SDR, all the processing is done on the CPU of the PC,
be it a Pentium or an Athlon. Both provide superb floating point performance,
that rival the computing power of dedicated DSP chips, bar the most
powerful ones.
73 Alberto I2PHD
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