Raspberry pi: no audio after update

I had a mini heart attack when I found that after the last update/upgrade of debian ‘Raspbian’ distro, audio was absent!!!
“here we go!” – I’ve said to myself – “Finally I’ve managed to broken this little pi..” . No audio, only music with HUGE noise! signal was so low!
But after a few minute I typed into a ssh session to the pi, the command “alsamixer” and found that audio was MUTED! Y U NO STAY UNMUTED AFTER UPDATE? everything is fine now.
Never get mini heart attacks for these things!