From the recording Backing and Jam Tracks for Bass Guitar Vol. 7
A really fun jam track for bass players as it introduces a new chord to your vocabulary. The Asus4 chord replaces the 3rd note of the scale with the 4th note and this should be reflected in your bass line. For a great effect when soloing over this A Minor progression, try using an E Minor Pentatonic Scale. That will bring out some very colorful notes, including the sus4. 105 BPM.
||: Amin | Amin7 | Asus4 | Amin :||