Hi,

For music lovers this is absolutely amazing check Law Of Attraction Songs - reprogramming thoughts & patterns - Francine Jarry

Also as you mentioned Led Zeppelin, I recall seeing someone play his roadway to heaven album backwards and he was saluting Satan!?
Anyway its good if you're enjoying it, but I don't know if there is any risk involved in being programmed by unwanted beliefs such as praising Satan or so...
Youtube is filtered out here but I think you can find that clip in youtube by searching backwards+led zeppelin+satan or so.

Elias