https://github.com/avicted/c_fft_visualizer
Visualize the Fast Fourier Transform (FFT) of audio signals in real-time using C, FFTW3 and Raylib.
https://github.com/avicted/c_fft_visualizer
fftw3 raylib
Last synced: 8 months ago
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Visualize the Fast Fourier Transform (FFT) of audio signals in real-time using C, FFTW3 and Raylib.
- Host: GitHub
- URL: https://github.com/avicted/c_fft_visualizer
- Owner: Avicted
- License: mit
- Created: 2025-09-10T15:03:31.000Z (9 months ago)
- Default Branch: main
- Last Pushed: 2025-09-27T01:10:45.000Z (9 months ago)
- Last Synced: 2025-09-27T01:24:04.683Z (9 months ago)
- Topics: fftw3, raylib
- Language: C
- Homepage: https://www.youtube.com/watch?v=iA3vQ_7LAjA
- Size: 352 KB
- Stars: 1
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# C FFT Visualizer
Visualize the Fast Fourier Transform (FFT) of audio signals in real-time using C, FFTW3, Raylib and PortAudio. Includes RTA-style smoothing, per-band peak-hold, and pink-noise compensation.
> [!WARNING]
> Early prototype.
> Only supports .wav audio files for now or Live microphone.
> Sample rates of 48kHz and higher may make the visualization lag relative to the audio.
## Requirements
- C Compiler
- [Raylib](https://www.raylib.com/)
- [FFTW3](http://www.fftw.org/)
Arch Linux:
```bash
sudo pacman -S clang raylib fftw portaudio
```
## Build and run
```bash
chmod +x build.sh
./build.sh
# Audio file
./build/c_fft_visualizer <--loop (optional)>
# Live microphone
./build/c_fft_visualizer --mic
```
## Features
- Log-frequency bars with fractional-octave smoothing (1/1…1/48)
- dB-domain time averaging (EMA) with Fast/Slow presets
- Per-band peak-hold with timed decay
- Pink compensation (pink-flat display)
- dB grid overlay and peak/RMS meters
- Use a live microphone with the flag: --mic
## Controls
- O: Change octave scaling (1/1…1/48)
- C: Cycle color gradients
- P: Toggle pink compensation
- A: Toggle dB-domain averaging (v.s. linear)
- F: Toggle Fast/Slow averaging preset
- H: Cycle peak-hold (Off, 0.5s, 1.0s, 2.0s)
- F11: Toggle fullscreen
## Configuration
Edit include/config.h to tune defaults
## Screenshot
## License
MIT License