How to change and remove Ubuntu startup sound

All the ubuntu system sounds like the startup sound, the error sounds,etc are of.  ogg format. All of them are located in the folder:

/usr/share/sounds/ubuntu/stereo

By default, Ubuntu provides a startup sound with file name “desktop-login.ogg”  in the stereo folder.But not everyone may like it. So, there are options of changing it to the sound you like.First of all, you have to download the sound you want.Make sure that the file downloaded is in the .ogg format. If not you can convert your sound file to .ogg by using the software Sound Converter which is available for free in the ubuntu software centre. Once you have got the sound in  .ogg, place it in the stereo folder mentioned above.
So now to change the default sound launch startup applications from the dash.

Once the startup application window opens, follow the steps below:

1. Click on the add  button and in the popup window, give a name say “startup sound”.Then in the command field type

/usr/bin/canberra-gtk-play –id=”start” –description=”GNOME Login sound”

NOTE: in the above command “start”  is my new sound file. change that with the name of your sound file.For example if your new file is  drums.ogg then replace the word For example ifstart with drums.

2.  give a comment and click  add .

So that’s it. The next time you login, you will get the sound you just set.

Others might not want the sound itself, for that in the terminal type the command:

sudo mv /usr/share/sounds/ubuntu/stereo/desktop-login{,-disabled}.ogg

Again in the command “desktop-login” is the default sound file. if you have already changed the default then replace “desktop-login” with the file you have changed to.