MagViz

Audio Visualization using an ESP32.

Functionality

Creates a cool visual effect in the ferrofluid using an electromagnet.

Line In

• When a line in signal is present, the MSGEQ7 is used to extract the frequency bands.
• When the delta betwen the current and previous 'bass' signal is great enough, the electromagnet is enabled, as long as the signal is rising, the electromagnet remains on.

Bluetooth

• When enabled (#define ENABLE_BLUETOOTH true), allows the ESP32 to connect as a bluetooth audio client
• Uses the AudioLibs FFT to compute the 'bass'
• Using the bass signal, enables the electromagnet when the base is high enough

Hardware

• 12v 1amp power supply.
• ESP32 Feather V2
• 12v Electromagnet
• TSR 1-2450 step-down switching regulator 5v
• Ferrofluid
• MSGEQ7 in the form of Audio Analyzer Module
• RCA Female Breakouts