Accidental radio on Shabbat

Q: The radio was accidentally connected to the Shabbat timer, and it turned on. What should one do in such a case?
A: There are three options: 1. Put a blanket over it. 2. Turn the dial on the timer to turn off in 5-10 minutes and the radio will turn off indirectly (gerama). 3. If the volume is controlled by a knob (not an electric button), you can turn the volume down with a "shinui" (an unusual way, i.e. with your thumb, back-handed, etc.).