A micro-optical light beam switch comprises a MEMS mirror array with packaged CMOS driving circuitry. The text and character selection is made by user contact with a touch sensitive screen. In particular, embodiments reduce leakage current at low input levels and prevent shoot through current for higher than nominal low input levels. Each atomic music segment may include one or more notes that have a substantially common onset time, thus providing an essentially indivisible unit of music convenient for user interaction and control.