A machine having a hydraulic power management system. The output drivers within an area on the integrated circuit are defined as a group, and an output model indicative of the operation of the output drivers and used to calibrate their output impedances is provided proximate to the output drivers. One or more deep trenches are etched in the semiconductor self-aligned to the planar gates. The sound board is thereby caused to vibrate at a frequency varying according to a tone pitch, thus producing a musical tone andor a damper tone.