2 clashing instruments - how to fix with EQ

I'm a bit new to detailed use of all Sonar's effects.   I have one song where it seems 2 synth parts are clashing with each other.   I'm thinking I can adjust their relative EQs up and down to give them more of their own space.   But, my question, how can I find the frequency that they are clashing on?   Is there a graph or analyser which will show me these 2 tracks playing back, and what their frequencies are, or some other way?

+1 on Span!

You can also play around with your EQ -  Do a cut and move it around to different frequencies and like magic the instrument you couldn't hear suddenly appears. (Sontius is excellent for this.)   Don't forget to play around with panning too.

I haven't tried this yet, but here is a freeware analyzer that you can put on multiple tracks.

Video here:  http://www.youtube.com/watch?v=aWjjxtkU8a0

There is a video somehwere detailing how to use Voxengo Span in just this sort of application.

It shows you how to set it up so that it responds to more than one signal, and gives a detailed analysis about how to home in on overlapping frequencies.

I think it was referred to in one of the Sonar X1 vids

Hang on - try this:

http://www.youtube.com/watch?v=-3XWm2SyoOY

There's 3 parts to this video, this is part 1

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Thanks for these replies, very helpful. 

I downloaded Span and this seemed to work quite well, I could see each tracks frequencies and how they changed over time. I could even see the exact frequency where the kick drum hits (I presume the logic is that is the kick here is too low, eg boosting that frequncy by a few db would help, and vice versa?).

I found that a synth pad I had covered a quite wide frequency with very few relative peaks, which was very similar to a big fat synth lead sound (which I did suspect would clash somewhere).   What would be the logical way to prevent these 2 clashing, when their frequencies are so wide, and so similar?

I will check out the other suggestions including the Span video.  Its true, as I use it now "out of the box" I have to check each track seperately.   

I particularly like the term "like magic", although I have a feeling it won't work like this for me :-)

 

Low pass/hi pass.  In one of your sounds start cutting out the bass.  Find the spot where it starts changing the sound too much.  Then cut the highs out of the other one until it affects the sound overly.  See if that doesn't differentiate them.