I'm trying to make a spectrum analyzer like this one:
The guy has very graciously provided his code. It runs in Processing 3.3 and sends the data to the arduino.
There are 2 problems though, 1: the sound library he used is broken and I really don't know how to fix it, and 2: He uses a microphone to get the audio, I would much rather use a headphone jack.
There was another option which was to use the sparkfun spectrum shield but that only has 7 bands. I don't know much about audio but I belive that means I could only have 7 columns of LEDs. Is there a way to expand that to like, 30?
I really am lost at the moment. Could someone please point me to the right direction.