Multitrack Visualizer

A small tool that loads multiple audio files at once and simultaneously renders each of their waveforms to PNG.

I plan on using this for my YouTube channel, where I upload chiptune music. I figured it would be a good visualisation tool, and different from my usual screen capture of FL Studio.

Screenshot

I've uploaded a full-song to YouTube using this software, so you can see what the final output looks like!

Usage

multitrack-visualizer.exe [OPTIONS]

Options:
  -s, --song /path/to/song.json       JSON config file for all tracks, colours, and audio files (default: ./song.json)
  -w, --window /path/to/window.json   JSON config file for size and scaling of the output video (default: ./window.json)
  -h, --help                          Print this help
  -V, --version                       Print version

JSON Config Format

Song.json

channels, an array of objects, where:
- name is the channel name, displayed on screen
- file is a path name to the audio file, and
- colour (optional) - contains the Red, Green, and Blue colour values (0-255). Defaults to black, ie. [0, 0, 0]
- use_alignment: (optional) - Attempt to align the waveform on each frame. Non-tonal channels or low frequency audio might look better displayed when this is turned off. Defaults to true
video_file_out is a path name to the video that will be output.

{
  "channels": [
    {
      "name": "Channel Name",
      "file": "/path/to/audio-file.wav",
      "colour": [0, 2, 255],
      "use_alignment": false
    }
  ],
  "video_file_out": "/path/to/output.mp4"
}

Window.json

width and height are the base resolution for the video file.
scale is how many times the resolution should be scaled (integer).
- For example, the default is 480x270 at a scale of 4, which means the final output resolution is 1920x1080.
frame_rate the frame rate of the output video

{
  "width": 480,
  "height": 270,
  "scale": 4,
  "frame_rate": 30
}