Are you a soprano, Sue? If so, try having the fiddle tuned as low as a fiddle goes, so there is less competition for the same notes.

Another thought is to use a percussive, Cajun-style accompaniment (ram ram-da ram ramda ram). This gets tiresome after a while, but then, everything gets tiresome after a while.

You can get ideas from recordings, but you have no idea how much sound engineering went into them. (For example, a voice can be recorded over itself to make it seem richer and more powerful than it actually is.) Actual humans may or may not be able to do what a recording does.