can somebody give some inside how the setting works:
Volume Level (Adjust the volume for your environment.)
quiet ; normal ; loud
I'm on Android app: 18.104.22.1685 armV7 on Android 8.1
There is a discussion about this on Reddit. Here you go: https://old.reddit.com/r/audiophile/comments/7zop46/psa_spotify_settings_for_volume_made_a_big/
How does this work with Spotify Connect?
These settings won't affect the playing of music from a connect hardware device, If you play music using connect, you'll see most of the android options aren't available.