PERCUSSION KEYER FOR AN ELECTRONIC MUSICAL INSTRUMENT

摘要

In an electronic musical instrument having a plurality of selectively operable keys associated with key switches and keyer circuits; a keyer circuit is turned ON to give out a tone signal by a trigger voltage derived from the key switch through a series-interposed capacitor and is subsequently turned OFF gradually by the charging operation of the capacitor. When the key switch is at a rest state, the capacitor is connected with a discharging route to prepare for the next operation of the key switch.