Updated 03-01-2013: to correct some details noticed by Georg from the Auphonic team I recently came across what may prove to be the single most useful podcasting tool I’ve seen in years. It is a free online service called Auphonic which automates the tasks of normalizing audio as well as noise reduction, encoding, distribution, and a whole lot more. Many podcasters regularly use The Levelator by Conversation Networks to do some of this. Levelator is great and can save you hours of manual p...