Originally Posted by: gmixstudiosHow do I know what chords to use in a chord progression

How do I know what scale to play over a chord progression
:D

A brief overview of music theory:
http://www.guitartricks.com/tutorial.php?input=495

Intro to improvisation:
http://www.guitartricks.com/tutorial.php?input=483
http://www.guitartricks.com/tutorial.php?input=491

If you have more specific questions, please post them in my instructor's forum. Best of success with it!