music.Songs usually expressed the feelings of their composers and many were about the difficult times. Some people say Mississippi was the birthplace of the blues，but early blues singers were also found in Texas，Alabama，and several other Southern states.As time passed，the blues moved north.Chicago became an important blues center. What does the blues sound like? Stringed instruments，especially the guitar，are important in blues playing.A piano is also often used.Piano players frequently get the sound they want by “crushing”