tinier vocoder (19 bands)

smaller 19-band version of https://www.audiotool.com/track/f7pp2xqz8nd/ this version also splits the bands starting at 100hz instead of 40hz which i think improves the clarity a bit now that there's fewer bands how to use this in your own tracks: https://www.notion.so/how-to-use-vocoders-in-your-tracks-on-audiotool-29cc9555d2308041b8e1db900607a71c