I'm looking to complete one of my first electronics projects so I was looking for inspiration from youtube Great Scott and this project caught my eye.
In short, his project converts the stereo signal to mono, amplifies it then compares it using a voltage divider network to light up rows of LED's based upon the voltage of the audio signal.
My question is looking at the circuit to me it looks like the OP amp can be used as a non-inverting amp for the audio signal. But then should this signal be used with a comparator and the voltage divider network to drive the MOSFET's rather than the OP amp circuit that is shown?
I didn't know much about OP amps before but this doesn't look like how they should properly be used?
and Youtube video.