Suppose I am playing a movie and the people are talking to each other. Instead of hearing their normal voice, I want to make their voice sound robotic by changing the frequency, pitch, etc. How can I do this easily? I tried VLC, it has audio equalizer but you can't really make it sound robotic. Is there any other standalone software that can change the voice of audio being played? I know there is a program that changes the voice of microphone input audio. But I need it for any audio that is being played on the computer.