Finding Mp3 track

I'm sure this has been discussed somewhere, but I really don't know what to search for to find exactly what I'm looking for.
I was wondering if there is a ready made mp3 of like a few hours of silence, followed by some kind of dreamy mantra, 'are you dreaming?' or 'when's the last time you checked reality?' or some such speech, that slowly gets louder (hopefully peaking at a nice volume:D)

I was hoping to put it on at the start of the night, fall assleep to the silence and then after I've slept for a few hours, the mantras come in, and hoping that it would feature in my dream.
If someone could direct me to something that might be like this I would be appreciative:)

Thanks.