Music and its creative processes were particularly impacted by the successful results of what?

Amplitude is: a. the number of waves in a certain amount of time. b. the distance between the top or bottom of a wave and the center of the wave. c. the noise floor acceptable in recording. d. the distance between two identical points on a wave.

Is it good to listen to rap all of the time or should i try listening to more music?

In which quotes does the author use the word "chains" literally? in which quotes does she use the word figuratively?