My music therapist said that you can listen to some of their pre-recorded stuff. The lock means that you need to have a paid subscription to hear it, so you can avoid the ones with the locks to listen for free. Also, you can create your own soundtrack by combining nature sounds, like having birds chirping with a waterfall in the background - or something to that effect. We're still going through all the sounds and determining if ALL of my alters find it relaxing, or if some don't. Only the ones we can all agree upon make the list. It's a unique way for my music therapist to work with my alters and I.