Hello! I' ve used LXLE for quite some time and this is one of the best distros I've ever used. However, I had a minor, though irritating, problem with the keyboard key to mute the sound. When I was pressing the keyboard key once the sound was muted, as expected. But when the key was pressed again, the sound couldn't be unmuted. The same when pressing the volume up or down keys. To unmute I had to untick "Mute" in the volume indicator using the mouse. The solution for this problem was on this thread: http://ubuntuforums.org/showthread.php?t=2001690 . According to this, one has to edit ~/.config/openbox/lubuntu-rc.xml file and replace the following command

amixer -q sset Master toggle 

with

amixer -D pulse -q sset Master toggle .

The same modification has to be done for volume up and down keys. Log out and then log in again and you are set. I think it will be helpful for quite a lot LXLE users having the same problem to find the solution easily on this forum.