A behavioral synthesis tool for generating an integrated circuit design is described. In some embodiments, the compositions of the invention are used to stimulate hair growth. The mute changes the timbre of the sound generated by the instrument, yet maintains the majority of the volume of sound prior to placement of the mute into the bell. The sealing panel is moved back and forth by a rotary cam mechanism. The invention enables automatic commodity purchase at a desired basis level when a seller’s price matches a buyer’s basis bid and concomitantly automatically placing an electronic commodities order to hedge the buyer’s purchase.