Mute/Unmute microphone on a Lenovo X201s

mute

#!/bin/bash
#Map this script to a button (eg F1) to mute your mic while VoIPing
currentlevel=`amixer get Capture |grep "Front Left:" |   awk '{ print ($5) }'`
if [ $currentlevel == '[100%]' ]; then
	amixer set Capture 0
	echo "Mic muted" >> /tmp/mutelog
elif [ $currentlevel == '[0%]' ]; then
	amixer set Capture 100 
	echo "Mic unmuted" >> /tmp/mutelog
else
	echo "Bad mic value. Mic muted anyway for safety"  >> /tmp/mutelog
	amixer set Capture 0
fi

Improvement: just use this command:
amixer set Capture toggle

works on every ubuntu pc I tried, much better...