1.   By then, Second Brother had gone inside and turned the radio up full blast.

2.   Can you turn your radio down a bit?

3.   Can you turn your radio down a little bit?

4.   Do you mind turning the radio down?

5.   Tom turned the radio on to a station that played dance music.

6.   Turn that radio off.

7.   Turn the radio off.

8.   Have you turned the radio off?