What about an alarm clock that already has many options for sounds but rather than you choosing the sound, it is done randomly. I find that I get used to my alarm clock and that it sometimes gets harder and harder to get up. I find it easier to get up when the sound is something that I have not heard before or in a long while.
Check this alarm clock out. With open source Linux OS, you can do just about anything with this. My guess is that it can play a variety of sounds.
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