Manhattan School of Music professor and professional double bass player Timothy Cobb teaching a bass lesson in the late 2000s. His bass includes a minimal C extension using a steel "machine" with buttons for playing the pitches over the extension. People today aiming to be Skilled musicians, singers, composers, songwriters, https://acheterdesvues18406.thenerdsblog.com/32805313/5-tips-about-music-you-can-use-today