Schematic video

[Mike(Mont)]

Just saw this and have no idea if it works

https://youtu.be/nPhz7Kp7ZYQ?si=xL6kK9wxBWRsUcjn

[Geo]

Hi Mike. I don\t know how it can work.... because both op-amlifiers have wrong bias.
As it is the schematic it needs very strong signal at input, maybe more than 0.5V

[Mike(Mont)]

Yeah, I don’t know anything about it. He said it works so maybe the schematic is wrong. He has some other LRL projects on his YouTube channel.