This circuit will behave as a VU meter. Capable of powering 5 individual LEDs or 10 LEDs arranged in serial pairs. The louder the signal that gets passed through the circuit directly corresponds to how many LEDs will illuminate and for how long. This is one of the first circuits I ever made myself, and remains dear to my heart. It's essentially the schematic given in the data sheet for the IC, but with a few altered values to work with guitar/bass.
