Playing by Ear - Chords
This is a PDF file that shows the chords to listen for when learning to play by ear. From top to bottom, this list the logical progression of Major and Minor triads that might be used. This is for the key of C, F, and G, however, the same numbers based on the scale will work in any key once you understand the concept. Also, this contains a brand new graphic of the Circle of Fifths that I designed..