Hi Pete
thanks for the new link, but i fail to understand how the code work .
i dont have any expriance in arduino but i want to give it a shot....
as described i built the neccesery cirucit and connected it to my audio output of my pc.
when i upload the code to my (MEGA2560) i dont see any feedback from the circuit exept from when i opening the serial monitor and the led on pin 13 go ON. i tried to open the serial monitor
put it on 115200 baud and wait and see the detction working but its seems to do nothing.
how can i adavnce and make it work (sorry for my bad english)
my audio output in full volume and my divider is on 512 please help.