I would like to suggest a possible space-saving feature: allow user to upload image of waveform (instead of only generating it from wav files).
Rationale: I’m working with mp4 and mp3 data (I know wav is better, but I have no control over the data generating process), and I need to convert these to wav and keep them around in order to see the waveform, which has become a key cue during data transcription. This causes logistical problems as data sets grow exponentially due to the size differences of these files. I understand that maybe it’s not possible to generate waveforms directly by the Elan source code for files other than wav, but there are some tools available to generate waveform images from a variety of a/v formats (ffmpeg).
Why not give the user an option to enjoy the features of a waveform without eating unnecessary storage?