i would like some info on whether or not it’s possible to “read” a PC’s audio output level. like the line that goes into the speakers. not an external wire, rather a digital signal that can be read by the arduino via the serial port. i guess what im looking for are the commands for serial communication that the arduino environment supports (regarding sound and audio that is). something like the Dimmer communications example code, although that uses Processing (which i know nothing of ).
basically the idea is that i’ll read the volume level and light up some LEDs accordingly.
i know i could go for the microphone and just read that on an analog pin nut i’ll need to add more circuitry than i would like.