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[K4IA]

Can anyone point me to an audio DSP program that uses your computer soundcard and speakers?  

[VE3IAY]

Not sure what kind of digital signal processing you want to do, but you might try http://www.muenster.de/~welp/sb.htm for a long list of audio DSP programs, from RTTY and SSTV to audio analyzers and filters.

Good luck and 73, Rich
VE3IAY

[KB9UMT]

Hello....I downloaded a copy of the demo DSP program from Silcon Pixels a while back called ChromaSound and it seems to be a real neat program to use!!  It was fun to play with but I got a newer rig with good DSP so never used this program to buy the full registered version but I think you would find this site and application that meets what you are looking for.

ChromaSOUND is a general-purpose audio DSP program, that provides the following features :

SSB "denoise", for reducing static on SSB signals
Automatic notch filter, for removing tones, heterodynes, and those pesky carriers
Bandpass, Low-Pass, High-Pass, and Band-stop (manual notch) filters
User-defined filters, using the built-in Graphical Filter Designer. Just drag your filter from the design window to an empty button!
Selection of pre-defined filters,
AGC, or Automatic Gain Control for operation under varying conditions

The website address below (pick Amatuer Radio then the ChromaSound DSP page):
http://www.siliconpixels.com/

73's and Good DSP hunting de KB9UMT Don

[KC7YCL]

I tried ChromaSound and it had so much echo that it was unuseable for me. I might have messed up the settings though.