As our audio-reactive projects increase in sophistication, we may decide to replace a simple MEMS microphone plus amplifier with one that offers automatic gain control. This is a follow-on to my ...

One way to address noise on analog signals is to take multiple readings and average them out, but the way that we do this depends on where the noise is originating in our system I always hoped to be ...

[El Artis] just finished building an audio spectrum analyzer that uses a character LCD. The uses an Arduino to drive the display, but unlike other meters that use the microcontroller for analysis, [El ...

This little LED rig fades in time to music. The hardware itself is quite simple, some LEDs connected to the PWM pins of an Arduino. But the signal processing is happening on a computer using a Python ...