I have recently discovered "Hemi-Sync The Monroe Institute Metamusic". I enjoy listening to these while I paint for the therapeutic benefits, relaxation and heightened creativity, concentration, creative flow, and when my feelings become tired and dull, in need of that xtra spark to keep me going, and so much more including real restful sleep if you can imagine and for healing purposes (physical and other)! I listen with quality headphones and earbuds (most popular), both are noise cancelling quality. I found this makes a world of difference. Many of these CD's run 20:00mins., 30:00mins., 45:00 and 1hr. Comments and feedback and questions and tomatoes(LOL) are most welcome, thank you.