condenser microphone connect to p16, audio amplifier and speaker connect to p18, and pull-upped switch connect to p5 for chage voice of low voice, high voice and ecoed voice.
test video-> http://youtu.be/z-7Hj0u6OlA
condenser microphone connect to p16, audio amplifier and speaker connect to p18, and pull-upped switch connect to p5 for chage voice of low voice, high voice and ecoed voice.
test video-> http://youtu.be/z-7Hj0u6OlA