In case that's helpful, here is the code we use to generate waveforms using: .mp3 -(1)-> .wav -> numpy -> matplotlib: https://github.com/learningequality/pressu

In case that's helpful, here is the code we use to generate waveforms using: .mp3 -(1)-> .wav -> numpy -> matplotlib: https://github.com/learningequality/pressurecooker/blob/master/pressurecooker/images.py#L138-L201 https://github.com/learningequality/pressurecooker/blob/mast... ffmpeg is used for the key step (1) ...