Why do we need a higher bandwidth for transmission of music compared to that for commercial telephone communicaton?

Explanation

The frequencies of speed signals vary from
300 Hz to 3100 Hz. Therefore, for telephonic
communication requires a small band width of
3100 - 300 = 2800 Hz.
Audio signals have frequencies varying from
20 Hz to 20 kHz. Therefore, transmission of
music requires a higher band width of about
20kHz.