An Orchestra That's YOURchestra Sum Of All Music is organizing a community orchestra right here in Simi Valley, CA Do YOU play an instrument? Did you train as a musician but took another job and missed your dream? Do you study music, or are retired from it and want to be a part of something special? We are now officially in rehearsal mode! But it's not too late to join... Message us below to participate. Add your name using the list below to stay up to date and let us know a little about you. Everyone is welcome. Invalid Email Invalid Number SEND YOUR MESSAGE Message failed. Please try again. Thanks for reaching out! We’ll be in touch soon.