We hawk a miracle tonic for all those songwriters stuck in a rut. Chord progressions stale? Emotional climax unreachable? Song not "karaoke-ready"? Try modulation – otherwise known as a key change!  The categories are key changes that are most: (1) joyful (2) cheap (3) emotional (4) unexpected. Featuring music from O-Town, David Bowie, The Beta Band, and more.