• I've never used the word jamming. It's a matter of finding a great song and learning the chords, then slightly altering the vocal melody, and matching a classic chord progression with another chord progression.

    M. Ward: I've never used the word jamming. It's a matter of finding a great song and learning the chords, then slightly altering the vocal melody, and matching a classic chord progression with another chord progression.
    Source: www.avclub.com