Adding Sound?

Support Basics & Interface
1

What are the basic steps to add sound to an animation?

And will .avi do sound? or do i need to export the video to a different format?

2

Open a Video Sequence Editor window
http://wiki.blender.org/index.php/Tutorials/Video_Sequence_Editor

and choose Add => Audio
http://wiki.blender.org/index.php/Manual/PartXIV/Sound_Sequence_Editor

Enable Do Sequence in the Render Panel - (F10)

Select the ffmpeg file format, and Multiplex Audio.

Hope this helps.