Outline on graphics and editing sounds

[VernJensen]

A white outline is typically caused by scaling down larger graphics to a smaller size, and doing the scaling with the image drawn on a white background. If you change the background to black first, then scale it, that can give you a black border instead, which tends to work better.

You may also want to zoom in 1000% with a good image editor, and check the pixels around the border of the image. Are they pure-white, or near-white?