Disable normalize() to fix volume pumping issue

- Commented out normalize(radio) which was causing dynamic volume swelling
- Added commented ReplayGain option as alternative for consistent levels
- ReplayGain uses static per-track adjustments from metadata tags

docker/asteroid-radio-docker.liq

@@ -24,7 +24,10 @@ radio = playlist.safe(
 
 # Add some audio processing
 radio = amplify(1.0, radio)
-radio = normalize(radio)
+# Normalize disabled - was causing volume pumping
+# radio = normalize(radio)
+# ReplayGain option - uses metadata tags for consistent volume without pumping
+# radio = amplify(1.0, override="replaygain", radio)
 
 # Add crossfade between tracks
 radio = crossfade(radio)