$24.99 Hearing Bass Lines Advanced Level quantity Add to cart Category: Ear Training Description Description Digital Downloads are Non-Refundable Related products MetroDrone®: All purpose practice tool Acoustic Bass $24.99 Add to cart The Harmonic and Melodic Equivalence Volume Five $19.99 Add to cart MetroDrone®: All purpose practice tool Tuba $24.99 Add to cart Singing the Blues Digital Copy $14.99 Add to cart