added audio scripts used in my river configuration

.local/bin/waybar_audio.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+# Get default sink name and volume
+sink_info=$(pamixer --get-default-sink)
+sink_name=$(echo "$sink_info" | awk '{print $3}')
+volume=$(pamixer --get-volume)
+muted=$(pamixer --get-mute)
+
+# Determine alt value for Waybar
+if [ "$muted" = "true" ]; then
+  case "$sink_name" in
+    *Steinberg*) alt="headphones-muted" ;;
+    *) alt="speaker-muted" ;;
+  esac
+else
+  case "$sink_name" in
+    *Steinberg*) alt="headphones" ;;
+    *) alt="speaker" ;;
+  esac
+fi
+
+# Output JSON for Waybar
+printf '{"text": "%s%%", "alt": "%s", "class": "%s", "percentage": %s }\n' \
+  "$volume" "$alt" "$alt" "$volume"
+