$24.99 MetroDrone®: All purpose practice tool Acoustic Bass quantity Add to cart Categories: Bass Guitarists, Ear Training, Time Studies, Instrumentalists, Guitarists Description Description Digital Downloads are Non-Refundable Related products Melodic Rotations 012345 $19.99 Add to cart One Minute Lesson Phrasing $24.99 Add to cart New York Guitar Method Primer Book One physical copy $21.99 Add to cart One Minute Lesson Harmony $24.99 Add to cart