To provide a system distributing a musical piece in which a brain activating sound source is incorporated.

The brain activating sound source is structured which exhibits effects of "being confident", "more concentrating", etc. being specific secondary consciousness, by being analyzed and structured on a sound source energy distribution spectrum level. Further, the brain activating sound source can be incorporated in a musical piece in real time by using a database structured by measuring effects of brain activating sound sources on many people. Consequently, when distribution service is provided through the Internet, a combination of a musical piece to be distributed and effects of the brain activating sound source can automatically be generated to provide the service without limiting the combination of the musical piece and the effects of the brain activating sound source.