Relativity and other Software can index audio files so that they can be searched for words and phrases.
In fact, OneNote, a program that comes with our MS Office installs, can index audio and video (audio) as well.
But one factor, often overlooked, is that it is quite easy to change words around in an audio file so that it sounds like someone has said something that they never said. In this session I will use a program called Audacity - a shareware software application - to change the words around in an audio file to demonstrate how this can be done. It is important in eDiscovery to inspect the meta data in audio files to determine as much about their use and when they were edited and to examine background sounds (for example if it was a recording made in a room with music playing - listen carefully to see if the music is disjointed when it plays).
In our file cabinet there is an audio file I will use to demonstrate this problem.
You can download and install audacity from this website but be sure you clear this with your I.T. team.