diff --git a/.config/mpv/input.conf b/.config/mpv/input.conf
index e61824b..2e537e2 100644
--- a/.config/mpv/input.conf
+++ b/.config/mpv/input.conf
@@ -6,3 +6,5 @@ Shift+DOWN  seek -5 - exact
 
 h add audio-delay 0.100 # this changes audio/video sync
 j add audio-delay -0.100
+
+M af toggle "lavfi=[pan=1c|c0=0.5*c0+0.5*c1]" ; show-text "Audio mix set to Mono"