Due to the subjective nature of the audio recording, we really cannot delve into the specifics of how to properly mix and master your Line 6 or Propellerhead recordings. We can, however, point you in the right direction to some sites that offer great information on how to get your recordings mixed and mastered properly to sound like they were created in a pro studio!
Ask Video
Provide great instructional DVD's on a wide variety of recording and music creation programs.
Keyfax NewMedia
An independent music technology music support company that offers many on-line videos and DVD's.
Groovebox Music
http://www.grooveboxmusic.com/store/home.php?
Another great site featuring instructional videos on many music technology products, programs, and techniques.