Need more info- what are you planning on dumping this signal into?

Are you making a PCB or do you need a breakout board for the jack?
Sparkfun (disclaimer: my employer) sells a nice 3.5mm to .1" header
breakout board (http://www.sparkfun.com/products/10588) along with the
jack itself.

After that you need something doing processing, sounds like. Maybe a
dsPIC?

Mike H.

On Thu, Sep 8, 2011 at 9:06 PM, Joshua Shriver <jshriver@gmail.com> wrote:

> I was thinking about writing a sound filter.  So from this lister
> perspective I'm wondering where I can get a mini-stereo jack input
> like you see radio/mp3 players have for headphones. Then from a
> programming i/o perspective what would that be considered and how do
> you interface with that? Guessing there is some form of
> analog-to-digital converter.
>
> First project is to try and create a noise filter. When listening to
> HF radio (ham) you can get a lot of noise. Thought by sampling I could
> build a nice list of what to cancel out :)
>
> Thanks for your time,
> -Josh
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