Add enable_volume_normalisation option

spotify/DOCS.md

@@ -37,6 +37,7 @@ name: HomeAssistant
 bitrate: 320
 username: [email protected]
 password: MySpotifyPassword
+enable_volume_normalisation: false
 ```
 
 **Note**: _This is just an example, don't copy and paste it! Create your own!_
@@ -88,6 +89,10 @@ to disallow guests on your network to use the add-on.
 
 The password you use to login to your Spotify Premium account.
 
+### Option: `enable_volume_normalisation`
+
+Whether to enable volume normalisation. For more info see the [librespot documentation][librespot-volume-normalisation].
+
 ## Known issues and limitations
 
 - This add-on requires a Spotify Premium account.
@@ -159,6 +164,7 @@ SOFTWARE.
 [forum]: https://community.home-assistant.io/t/home-assistant-community-add-on-spotify-connect/61210?u=frenck
 [frenck]: https://github.com/frenck
 [issue]: https://github.com/hassio-addons/addon-spotify-connect/issues
+[librespot-volume-normalisation]: https://github.com/librespot-org/librespot/wiki/Options#volume-normalisation
 [reddit]: https://reddit.com/r/homeassistant
 [releases]: https://github.com/hassio-addons/addon-spotify-connect/releases
 [semver]: http://semver.org/spec/v2.0.0.htm

spotify/config.yaml

@@ -21,3 +21,4 @@ schema:
   bitrate: list(96|160|320)
   username: str?
   password: password?
+  enable_volume_normalisation: bool?

spotify/rootfs/etc/services.d/spotifyd/run

@@ -29,6 +29,11 @@ if bashio::config.has_value 'username'; then
     options+=(--password "${password}")
 fi
 
+# Volume Normalisation
+if bashio::config.true 'enable_volume_normalisation'; then
+  options+=(--enable-volume-normalisation)
+fi
+
 # Save writes
 options+=(--disable-audio-cache)
 

spotify/translations/en.yaml

@@ -23,3 +23,7 @@ configuration:
     name: Spotify password
     description: >-
       The password to log into your Spotify Premium account with.
+  enable_volume_normalisation:
+    name: Enable volume normalisation
+    description: >-
+      Whether to enable volume normalisation.