TAMUctf 2021 Spectral Imaging - 100 points

Some things are meant to be heard but not seen. This sounds like it’s meant to be seen, not heard. audio.wav

Spectral Imaging is just a simple spectrogram problem which I’ve seen many times before. Open the file in Audacity, switch to spectrogram. Set the settings to high top frequency and that’s all. This can probably also be solved with sox.

Audacity spectrogram of audio.wav