Cassette recording

Hi Marcus,
If you're talking about remixing as in "I want to change the drums to be louder" or "that guitar has to go", then no.
You're more than likely dealing with a two track that was recorded in.
 
Now, if your remix means doing something like a "mixtape", then yes.  Sonar can help you with that.
You can cut and splice and rearrange (use the split tool and a couple of extra tracks).
There are a number of really good people here so they will help you with details.
 

marcushnz1
Thanks for  your reply Arlen.
I think I am dealing with a two track recorded in as you suggest.
Can you briefly tell me what a mixtape is.
Nice music by the way...

A mixtape would be mixing the song that you recorded in, into other songs. Like a continuous mix from one song to another.
 
Another thing you could consider, is taking the current song that you recorded and adding to it. Although, it would be hard to mess with the mix of the original recording, you can add or subtract to the whole. Think of a painting that has completely dried. You can add more colors to it, or chop it up and re-arrange it, but the main painting will still be there, unless you completely cover it with another color (sound).

You may be able to do some sort of remixing by using a multiband compressor. Roland had a product, I think it began with the letter R that would give you an opportunity to sort of change levels on different parts of the recording.