The only meditation I would have done before would be in the writing of songs. In the composing of music you have to enter virtually a trance state to transmit songs. I don't think you write songs. They come through you. For that you need a certain amount of mental purity.
Yoga is just a different route to that same process.
You're taking something from our higher selves and putting it to use in normal life, I think. Sometimes it drives me totally crazy. In absolute silence I hear music. I hear music, I hear rhythms, I hear bird song. I live in an aural world.