Panning

Let's pan the volume from left to right over the duration of the sound. It's really easy to use Adobe Flash to create this effect, without adding much to the file size. Flash can take a mono signal and fade the volume from left to right (or right to left) with the click of a button.

First, select the frame in the timeline that holds the sound sample:

Use the Properties window to set the Effect to Fade left to right:

It's that easy! Test it out:

You may want to compare with the previous sample, without the panning: