Let's start jamming Boston - (Album Version) The Launch A Countdown B Ignition C Third Stage Separation chords, familiarize yourself with these chords - Dm, Bb, Cm, Dm, Eb, Ab, Bb, Cm, Eb and Dm in sequence. The tempo control on ChordU helps you begin at a comfortable speed and increase as you learn. Adapt the capo setting considering your vocal range, with reference to the key: Eb Major.