Music for Labor and Birth

As a doula, I try to be careful of suggesting things that seemed to work for me, personally, in my own labors and deliveries... mostly because it's not my place to share with clients what I did, etc. It's about that woman, that baby, that family and what works for her, for them... and as a doula, I want to respect that and to have a trust there.
I do want to share though, something that I found helpful and very integral in the labors and births of my two daughters. Music.