I am using PE4 on a new computer. Made a video which used audio. When trying to use an added mic for narration, all the audio went to echo but repeating the same words as in an echo chamber. I did a system restore on XP and played the clips again without narration and it was back to normal. Tried another mic but did not help. Any ideas? I have scanned the forum for clues. Tried to down load a new driver for the Realtek drivers as found on your web but they want $30. I was looking for a fee down oad. Any ideas? Thanks for the site!