This simple tutorial will show you how to enable Startup (login desktop) sound which is disabled by default Ubuntu 12.04 precise.

1.Click Control Gear then click Startup Applications…

2.In the Startup Applications Preferences window ,click Add to add an entry

3.Then fill below lines as Command

/usr/bin/canberra-gtk-play --id="desktop-login" --description="play login sound"

For Name and Comment,you can fill in whatever you want

4.You are done,logout then login,you will listen the startup sound

Note:If the above steps do not work for you.

you can try replace the command in step 3 with

/usr/bin/paplay /usr/share/sounds/ubuntu/stereo/desktop-login.ogg

Or add the “–volume” option to the command in step 3,eg:

/usr/bin/canberra-gtk-play --id="desktop-login" --description="play login sound" --volume=10