Turn on vs switch on

Hi,
I wonder if there is any difference between the verbs, that is, if they depend on the way we operate.
Three or four decades ago we really used to TURN down the volume of our TV-sets, now we just press the button. But we still turn when dealing with a radio.

- Please turn off the TV-set or at least turn it down.-

Do people still say so?
Which is more common – switch on (the light, the gas-cooker etc) or turn on?
If some loud music annoys you, what do you usually say to the one who’s listening to it?

Thanks

Power up

Both "switch on" and "turn on" are equally common.

For the loud music you could say:
- turn it down
- lower the volume
- quieten it (down)
- kill the music