Musical instrument is a specific tool for producing certain sounds. Each one is designed for its purpose and is refined by generations and ages of cultural processing. When making sound by using any of existing musical instruments we expose ourselves to the whole complex of cultural legacy related to this certain tool.
What if we invent and build sound instrument of our own design? Device based on personal understanding and interest. An expression of our own imagination. What is the definition of sound and technicue of playing ? Is it music? Even if its not stright continuation of previous musical tradition. Is it still subject of the cultural processing ?