Manhattan College of Music professor and Specialist double bass player Timothy Cobb educating a bass lesson in the late 2000s. His bass has a low C extension by using a steel "machine" with buttons for playing the pitches to the extension. Persons aiming to be Skilled musicians, singers, composers, songwriters, https://plus-de-vues47865.is-blog.com/33523995/an-unbiased-view-of-youtube