hei, thanks for the links... so the site is build on drupal....

I don't think I have the needed skillset to create a module for drupal, but I think that achieving what I said should not be that hard: I investigated and found a software that creates a png with the spectrogram of a music track: https://github.com/beschulz/wav2png

The software is used on freesound and more details for developers can be found here: https://freesound.org/forum/freesound-project/1114/?page=1#post

I'm not really sure if it can be implemented on drupal but If I find a way I will let you know.

It is not really that important but I think it would be a nice feature to add.

Here you are:

Code: https://ufile.io/4fwlpdii

Just for clarification, I don't know how modules for druppal are created and that is just a simple implementation in pure javascript / html, but it works and even if you don't create a module for druppal you can inject it in the code (although that's harder to maintain afterwards).

I have no account on github and since is not a druppal module which I think is the best way to add such feature I'm sharing it here, In the hope that you find it useful and / or inspiring!

I forgot to put some context about the main javascript library used for the player and here many examples and documentation can be found: https://wavesurfer.xyz/examples/?zoom.js

The code is open source and it has BSD license: https://github.com/katspaugh/wavesurfer.js?tab=BSD-3-Clause-1-ov-file#re...

I'm not sure if there is any incompatility with such license as I've never heard of it before.