Adding audio frames using 'avifile'

Hello,

 I want to create a custom avi file with my own images and audio data. I do not have a newer version and hence cannot use 'videoWriter'.Neither do I have the vision toolbox to use 'vision.VideoFileWriter'. So I intend to use 'avifile' instead. However, from the help description, I am able to see only video frames/images being added; I have not come across any description or example where audio data is being added to the aviobject. For my experiment, I would like to create my own audio and add it to the video in the file. 
So, is it possible to add audio data frames via 'avifile'? If so, how do I go about doing that?

Thanks and regards, Siddharth.