How to edit the volume of an audio clip in 2.49?

Can someone help me figure out how to adjust the volume by IPO curves in 2.49? I know there was a video tutorial, the one with the cube moving and showed us how to add audio and adjust the volume. I can’t find that video anymore for some reason.

Just download Audacity and prepare your audio in that external program.

Oops, did I just suggest that there is software other than Blender that one might use to get work done? is as good a place as any to start.