Filter volume changes

.bin/volume_subscribe.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+OLD_VOL=0
+pactl subscribe | grep --line-buffered "sink" |
+while read; do
+	VOL=$(amixer get Master | grep -Po "[0-9]+(?=%)" | tail -1)
+	if [[ $VOL != $OLD_VOL ]]; then
+		tvolnoti-show $VOL
+		OLD_VOL=$VOL
+	fi
+done

.config/sway/config

@@ -54,7 +54,7 @@ exec mako --default-timeout 10000
 exec tvolnoti -n  -T dark
 
 # Monitor volume changes
-exec pactl subscribe | grep --line-buffered "sink" | xargs -n1 sh -c 'tvolnoti-show $(amixer get Master | grep -Po "[0-9]+(?=%)" | tail -1)'
+exec ~/.bin/volume_subscribe.sh
 
 # Register a fake player in bluez so that volume control would work
 exec ~/.bin/fakebluezplayer.py