What is the difference between using a program on CD or a program on Cassette?
It really doesn’t matter. Both mediums have the same subliminal content. The only advantage could be the fact that most CD players can be set to repeat so that the program plays continuously. If you want to do this with cassettes( quite a lot of people do this) you’ll need to buy a cassette player which has continuous auto reverse (basically that means the tape keeps on reversing when it has finished playing a side). Personally, I use both CD’s and Cassettes and have experienced profound changes using both.