When using Audacity, is it possible to get a backing track that you import, and your lead that you play over it, to sound like they are coming from the same place, if you get me?
Not sure if I get you. Maybe fiddle with gain and panning a little?
Co-President of UG's Tubgirl Virgins Club

If your backing track has a lot of reverb which most do, you may want to add some reverb to the lead, and also adjust the volume.