Manhattan University of Music professor and Qualified double bass player Timothy Cobb instructing a bass lesson in the late 2000s. His bass contains a very low C extension by using a metal "equipment" with buttons for taking part in the pitches over the extension. People today aiming to become Specialist https://chanceaoygr.dailyblogzz.com/27793551/5-tips-about-music-you-can-use-today