Rust library: audio-visualizer

So far this library is rather basic and targets developers that develop audio algorithms. With this library you can easily display your current audio data/waveform/spectrum and check if everything looks good/as expected.

Covered Functionality

• dynamic real-time audio
  • [x] functionality to record audio and connect it with a GUI window
  • [x] side-by-side (top/btm) view of original waveform and custom view (e.g. spectrum or lowpass filter)
  • [x] cross-platform (Windows with WASAPI, Linux with ALSA, MacOS with coreaudio)

• static waveform

  • [x] very basic PNG output
  • [x] PNG output with basic axes/labels using https://crates.io/crates/plotters
  • [ ] TODO fancy static output (code contributions are welcome)

• static spectrum

  • [x] very basic PNG output with the option to highlight specific frequencies (definitely needs more work, code contributions are welcome)
  • [x] PNG output with basic axes/labels using https://crates.io/crates/plotters (definitely needs more work, code contributions are welcome)
  • [ ] TODO fancy static output (code contributions are welcome)

(Code) Examples

There are several examples in the examples/ directory. Below, you can see some visualization examples.

Real-time audio + lowpass filter (6.9MB GIF)

\ On the top you see the original waveform of the song Holiday by Green Day. On the bottom you see the data after a lowpass filter was applied. The beats are visible.

Real-time audio + frequency spectrum (5.4MB GIF)

\ On the top you see the original waveform of the song Holiday by Green Day. On the bottom you see the frequency spectrum of the latest 46ms of audio. Frequencies <2000Hz are clearly present.

Example of a static waveform

Example of a static spectrum

MSRV

The MSRV is 1.56.1 stable.

Troubleshooting

Linux

• make sure to have these required packages installed: sudo apt install libasound2-dev libxkbcommon-dev