The folks at PM are so helpful. If you are a newcomer, prepare to be very courteously assisted! Gotta brag on a very helpful representative, Isabelle. I'm very ignorant computer-wise. I'd purchased some LifeFlow entrainment audio and it didn't work on my computer. I followed suggestions on FAQ and it didn't work, so I e-mailed customer service. Well, in a couple of days, Isabelle contacted me and I explained the situation. She helped me resolve it and now I can play my LifeFlow!! ;-) YAY!! THANK YOU, PROJECT MEDITATION FOLKS!!