ESP32-based music visualizer for WS2812 LED strips.
This project uses noriah/catnip to process audio on the system into frequency bins, and then uses those frequency bins to render a visualization to be sent to the ESP32, which acts as a controller for a WS2812 LED strip.
┌───────────────────────────────────────────────────────────────────┐
│ │
│ Linux Machine │
│ ┌──────────────────────┐ │
│ │ │ │ ┌─────────────┐
│ │ ┌────────────────┐ │ ┌──────────────┐ │ │ │
│ │ │ │ │ │ │ │ │ │
│ │ │ LED Renderer ├──┼──► /dev/ttyUSB0 ├───┼───► ESP32 │
│ │ │ │ │ │ │ │ │ │
│ │ └───────▲────────┘ │ └──────────────┘ │ │ <ledserial> │
│ ┌───────────────┐ │ │ │ │ │ │
│ │ Audio Players │ │ ┌───────┴────────┐ │ │ │ │
│ │ │ │ │ │ │ │ └──────┬──────┘
│ │ Spotify ├──┼──► catnip │ │ │ │
│ │ Firefox │ │ │ │ │ │ │
│ │ Mixxx │ │ └────────────────┘ │ │ ┌──────▼───────
│ │ ... │ │ │ │ │
│ └───────────────┘ └──────────────────────┘ │ │ LEDs...
│ │ │
└───────────────────────────────────────────────────────────────────┘ └──────────────
go build./catglow -c catglow.toml # run with a config file[[led]]
range = [40, 192]
[led.visualizer]
kind = "glowing" # see #Visualizers
flip = true # flip the LED strip
bins = -1 # use as many bins as there are LEDs, otherwise bins are sectioned
backend = "pipewire"
device = "spotify"
smooth = 0.5
gradients = [
[255, 0, 0],
[0, 255, 0],
[0, 0, 255],
]
gradient_mode = "peak" # "peak" or "duration" or "static"
gradient_peak_switch = 0.85 # switch to the next gradient when the peak is above 85%
gradient_peak_bin = 0 # use the first frequency bin for the peak
gradient_duration = "1s" # used if gradient_mode is "duration"
[[led]]
range = [0, 40]
color = [255, 255, 255] # static colorglowing: glow each LED based on the frequency bin.blinking: blink the entire LED strip based on the normalized amplitude.meter: show a horizontal meter based on the normalized amplitude.