Lookas

A terminal-based audio spectrum visualizer written in Rust.

Lookas Visualization

How It Works

Lookas captures audio from your system's input device, performs a Fast Fourier Transform (FFT) to analyze the frequency content, and displays the result as animated bars in your terminal.

Installation

cargo install lookas

Usage

Simply run:

lookas

Configuration

Lookas can be configured using environment variables:

Variable	Description	Default
`LOOKAS_FMIN`	Minimum frequency (Hz)	30.0
`LOOKAS_FMAX`	Maximum frequency (Hz)	16000.0
`LOOKAS_TARGET_FPS_MS`	Target frame time in milliseconds	16
`LOOKAS_FFT_SIZE`	FFT size	2048
`LOOKAS_TAU_SPEC`	Spectrum smoothing time constant	0.06
`LOOKAS_GATE_DB`	Noise gate threshold (dB)	-55.0
`LOOKAS_TILT_ALPHA`	Frequency tilt factor	0.30
`LOOKAS_FLOW_K`	Flow coefficient for bar interaction	0.18
`LOOKAS_SPR_K`	Spring stiffness	60.0
`LOOKAS_SPR_ZETA`	Spring damping factor	1.0
`LOOKAS_MODE`	Default mode ("rows" or "columns")	"rows"

Example:

LOOKAS_FMIN=50 LOOKAS_FMAX=10000 lookas

License