Voice changer

Thread Starter


Joined Mar 21, 2013
I am working on a project as a sophomore electrical engineer, i am trying to build a voice changer by using a mic to use for voice input with a filter(low or high) then an amplifier to amplify the sound and finally another filter (low or high) , to get a voice of a favorite character. i did some research and i found that an active bass band filter does almost the same thing would that work for my case?

this is a schematic for what a bass band filter does, my input will be the microphone and my output would be a speaker. If you have any suggestions i will be happy to hear them.

Thank you


Joined Mar 14, 2008
Yes, an active filter is ideal to use at audio frequencies. It avoids the large inductors that are required for audio passive filters. To design the filters I suggest you download the free FilterPro software from Texas Instruments.

But you would put both filters in front the of amplification if that is a power amplifier for headphones or speaker.