Yuki Aida is a Japanese sound composer. His music is used for some Japanese independent films and Psychotherapy. He plays the guitar and he perform various editing and build music.He uses a lot of noises. However, as for his music, organic an overflow in romanticism. About "South/North,text." We recognize the sound of the wind as a sound of the wind. However, will a change of what kind of frequency participate in the recognition? When I listen to the sound that there is not it, and is near only for the sound of wind made with the bleep that there is not at all in the natural world, how will our experiential recognition shake? It happens between real recognition and imagination, a system of the experience. He shows the relations of they aspect each other to us to us with the bleep that is experience (or, recognition of the imagination) that we have in each and a virtual sound again. By the way, the title of the musical piece depends on the atomic weight of rare-earth elements such as europium or the lutetium. He was strongly attracted by natural structure (the thing which, in particular, is systematic) to have during the production. However, the thing is not connected with musical piece it in itself directly.