Manhattan College of Music professor and Specialist double bass participant Timothy Cobb instructing a bass lesson from the late 2000s. His bass contains a lower C extension using a steel "device" with buttons for enjoying the pitches over the extension. Persons aiming to be Qualified musicians, singers, composers, songwriters, music https://acheterdesvuesyoutube07395.onzeblog.com/27305584/the-best-side-of-music