1) In "Bill Haley & His Comets - Rock Around The Clock" (1955), which instrument plays the walking bass?
2) In "Bill Haley & His Comets - Rock Around The Clock" (1955), which instrument improvises?
1) The double bass plays the walking bass in "Bill Haley & His Comets - Rock Around The Clock" (1955).
2) The saxophone improvises in "Bill Haley & His Comets - Rock Around The Clock" (1955).