I've read a lot about "Ducking the Bass" and want to experiment with it a little.  However, I get hung up on specific lingo. I'm pretty new to recording and Sonar...  I have producer.  I'm using Addictive Drums. 
 
I know that I need to set up a "sidechain" but I'm not totally sure how to do that.
 
If someone could give me some instructions, that would be awesome!  Also, I'm wondering if I can hook up the send from the bass drum of Addictive Drums, but not the other drums...  I could just make a separate track exclusively for the bass, but I wasn't sure if that was the most efficient... 
 
Any help or suggestions is appreciated.

Have you tried this?
http://www.youtube.com/watch?v=RbpFYuwPqds

That looks like exactly the kind of tutorial I was looking for....  Thanks!  I'll try it and post how it works out.

I did two assignments for a recent online course which may be helpful to you. They are both text-based, one is on ducking, and the other is on mirror EQ (specific to fitting a kick drum and bass together).

Thanks Mettelus!  This looks awesome... 

I think sidechaining, in this case, sounds bad. If your using it for voiceovers, as it's intended, then that's fine. The use of EQ is the way to go. There is a video floating around here with the fabfilter pro Q that gives a nice example of how to set up the bass drum. You can do the same thing, inversely, to the bass guitar so the BD and bass guitar co-exist as they should.

Yeah...  This is totally ridiculous.  I'm just messing around - trying to learn all the different possibilities for techniques.  I made a techno-house-style song (which is waaaayyy outside what I normally do) and read that that was used a lot in this music...  Wanted to give it a go - and it works beautifully.  Now, on to something else cool.
 
But, yes, the Mirror EQ Mettelus posted about was what I usually do and (I think) what you are talking about.  That will be my go-to technique for serious projects.  Having the bass and drums live together and get along is much more my style.

mettelus
I did two assignments for a recent online course which may be helpful to you. They are both text-based, on is on ducking, and the other is on mirror EQ (specific to fitting a kick drum and bass together).

Sweet sweet job man...enjoyed both reads and will enjoy (hopefully) integrating them into my upcoming mixes.  That Fabfilter video -- actually all of them -- are pretty stellar. 
 
p.s.  Baltimore, huh?  I grew up in Rockville and went to Towson...back when it was still Towson STATE.  =)

Dan Worrall's video is a reference in my mirror EQ presentation (I absolutely love his video for the content he presented). It is a sales pitch for FabFilter Pro Q, but the methods are universal concepts.
 
"Dan Worrall's video (this is a brilliant video demonstrating the topics covered in this presentation, but in more detail) - http://www.youtube.com/watch?v=kSNYBbPAvKE "

Ducking bass seems fraught with improbability, as sound is vibrations in the air and physically ducking air may in fact prove impossible?!!
 
If you're looking for your bass to sound like a duck? Why not cut out the middle-man and hire an actual session duck for the parts?
 
Of course if what you're talking about is the little known stompbox manufacturer, Fudd-Hole Technologies, newest pedal?
To be honest going by the attached image?... I think it's fake!