I don't usually use an alarm clock but when I did, it would be music. Nothing is worse (to me) than waking up to an annoying buzzing sound. What a terrible way to be woken up!
Unfortunately, when you use the TV as white noise while you sleep, music tends to be incorporated into your dreams. I have to put my annoying sound out of reach, too, so I have to get my feet on the ground to make it go away. By then, well, hell, I'm up anyways...
Yes, I don't trust leaving the TV on as it can too easily go into stuff, not necessarily music, that isn't white noise to me and it does get incorporated into my dreams or it wakes me up. The movies I choose to be white noise don't do that.
I never could sleep with talking or music going on. I find it too distracting. I can sleep with other types of noise just not talking or music. I usually sleep with my fan on because the noise drowns out other noises and actually helps me sleep. If you knew how much electricity your TV eats up, you would hardly ever leave it on. Lol.
I was outside a couple of weeks ago near my electric boxes, and I noticed that mine was spinning SO fast, so I went inside and turned off some things so I could see what it was. Well, when I shut off the TV, it was only spinning 1/4 as fast, even running my dishwasher or my washer or dryer doesn't make it spin that much. I used to leave my TV on during the day sometimes, for background noise or just in case something interesting came on,whatever. Now, I hardly ever have my TV on.