Virtual Keyboard Design Electronic keyboards are designed using the following equation that assigns particular frequencies to each of the 88 keys in a standard piano keyboard, f ðnÞ ¼ 440 ffiffiffi 2 12 p

n49 Hz where n is the key number. There is a need for an amplifier that can pass middle C, key 40, but block keys 39 and 41.

Design such a filter using an RLC tuned circuit with a gain K of 100.