diff --git a/README.md b/README.md
index 83640cd..3aa70b6 100644
--- a/README.md
+++ b/README.md
@@ -100,4 +100,4 @@ Set volume for playback and recording
 Launch soundcard mixer
 > `alsamixer`
 
-Press F6 to select a soundcard. Find your USB sound device in the list e.g. `Jabra Speak 410 USB`. Press F4 and use up/down arrow keys to set recording volume and repeat also for the playback (F3). Press ESC fo exit.
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+Press F6 to select a soundcard. Find your USB sound device in the list e.g. `Jabra Speak 410 USB`. Press F4 and use up/down arrow keys to set recording volume and repeat also for the playback (F3). Make sure it is not muted. Press (m) to toggle mute. Press ESC to exit.
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