To learn 許冠傑 - 知音夢裡尋 chords, grasp the musical fabric of the song with this sequence - Db, C, Fm, C, Fm, Eb, Fm, Db, Fm, Bb and Bbm of chords. Adjust your pace with the tempo control on ChordU, starting slowly and speeding up progressively. Considering the song's key of Ab Major, position your capo to suit your vocal and chord preferences.