If you are listening to the recordings and it's annoying to you that they have different loudness levels, you can try out my add-on that normalizes the levels:

If you are listening to the recordings and it's annoying to you that they have different loudness levels, you can try out my add-on that normalizes the levels: https://addons.mozilla.org/de/firefox/addon/vmo-audio-normalizer https://addons.mozilla.org/de/firefox/addon/vmo-audio-normal... You can also see a demo here (requires git clone): https://github.com/est31/js-audio-normalizer https://github.com/est31/js-audio-normalizer