An informative or entertaining audio piece that is circulated on the web. Podcasts mix voice and music and are usually produced by individuals or amateur, non-commerical groups with modest technology. They can be listened to on the PC or mobile device or by visiting a website; but many use I-Tunes to subscribe to the feed and automatically download new material to their I-pods. Some years ago, Podcastalley.com listed 39,000 podcasts with 2.5 million episodes. More recently, radio networks like NPR, PRI and BBC “professionalized” podcasting; here are some of the best professional podcasts.
(Successful podcast series are distributed with an RSS feed, usually via a blog. This allows the audience to “subscribe” using Itunes or similar software and then receive automatic updates).