Manhattan School of Music professor and Experienced double bass participant Timothy Cobb training a bass lesson in the late 2000s. His bass includes a low C extension which has a steel "machine" with buttons for enjoying the pitches over the extension. Men and women aiming to become Specialist musicians, singers, composers, songwriters, music teach

With the advent of dwelling tape recorders from the eighties and digital music within the nineties, music lovers could make tapes or playlists of favourite music and choose them with them on a conveyable cassette player or MP3 player. Some music lovers generate mix tapes of favourite tunes, which serve as a "self-portrait, a gesture of friendship,