Another of my common requests.
My standard vu meter converted too line in, and now stereo.
15 vu meters, and 9 standby patterns. with full build instructions, including upgrade instructions if you have made the old stero vu meter.
I have included a push button and bluetooth version ( which includes the android app). please watch the video and take note of the bluetooth warning before building it.
code download : https://drive.google.com/open?id=145pY3ByPfDTC0tmGeLYkQ2MEysLn3k4S
Arduino ide: https://www.arduino.cc/