I am trying to turn lights on base on frequency of my audio input. But I want my audio input to come from an audio jack and not some microphone.
I think 10K Sample rate should be enough for me. But if I want my sample rate to be higher, how would you suggest doing that.
You said "bias it to 2.5V with a couple of 10K resistors, and then AC couple into that with your audio source"
How exactly do I do that? Sorry I am sort of new to this. Do you have a sample circuit diagram or sample set up? Thank you