Definitely your volume is your primary [and perhaps only] issue.
Recommendation #1
If you typically have computer access from work, you should consider doing this after you go home:
A. Go to
http://www.logmein.com
- create an acccount
- sign up for the free LogMeIn -
https://secure.logmein.com/createaccount.asp
B. Install the Free LoginMeIn on your feed machine.
Then, you can access your PC remotely from anywhere simply by logging into
http://www.logmein.com using a web browser (IE works best).
That way you'd be able to manage things while you are away if you need be. With this type of access I'm sure you could find it very convenient for many reasons.
Recommendation #2
For both of my feeds I use the headphone jack on the scanner. I have found that setting the scanner audio level itself _low_ works very well. Much easier to adjust volume up/down remotely this way. Plus, you'll never push so much audio in that it would cause what you have now - distortion and clipping.
Summary: Install LogMeIn - you'll love it. Then set the volume on the scanner low and use the audio mixer app on your computer to adjust the Line-In (or mic-in, whichever you use) audio to the right level in the Advanced / Recording section.
mike