This is a command-line tool. Use '-h' or '--help' to get help.
Sometimes the built-in merge function doesn't work properly. You may want to use 3rd party tools to merge your base sound files with the pure output.
Major changes since last release:
- Switched from log scale to linear scale, which appears to be more common for spectrogram visualizers. (These modes will be a user-set option in the future.)