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Let's first explain what RSS feeds are, because this helps in explaining what a podcast is. RSS is an acronym for "Really Simple Syndication". It is a format for sharing and distributing Web content. The concept is, instead of you having to manally visit your favorite blogs, news sites, or other websites to see if there is new content, you can subscribe to the site's RSS feed and the information can automatically be "delivered" to you. Using an RSS reader, you can view data feeds from various sources, which will usually include a headline, summary, and link to the full story. It's an easy and efficient way to receive notification when new information is available in a specific area of interest.
The commonly used symbol for an RSS feed is an orange box with
a white symbol resembling airwaves emanating from the bottom left corner
(
).
When an RSS feed is available on a website, it is usually indicated by
this icon or some variation of it.
Now, a podcast is simply an RSS feed that contains audio content. The content contained in a podcast can vary significantly, from a song, to an educational lecture, even video. Subscribers can download or listen to the contents of a podcast at a time and place of their choosing.
Podcast receivers are programs that display the contents of a podcast, allowing individuals to download the audio file and listen to it on their computer or mp3 player. iTunes is a popular application that consumers can use to subscribe and listen to podcasts. (iTunes can be downloaded for free from www.apple.com). Once users have a podcast receiver installed, they can simply click the icon or they can copy and paste the podcast feed link into the podcast receiver. If your podcast is submitted into iTunes, people can also search and subscribe directly through the application.
If you already have audio recordings you would like to use for your podcast, you're halfway there. An RSS feed will need to be created for you and then uploaded to your website or web server along with your audio files. At that point it can also be submitted for inclusion into iTunes.
The audio needs to be in either .mp3 or .m4a format. The .mp3 format is standard and more common, but .m4a is also acceptable and generally has better quality and smaller file sizes.
Your podcast should have a title, short description (a blurb or sentence), a long description (2 or 3 sentences), and keywords (about five, that users can use to search for your podcast on iTunes). When you submit your audio, make sure you also send this information separately for each episode.
Audio and video files take up additional storage space and bandwidth on your web server. Eventually it may become necessary to either remove/archive old episodes, or pay for increased storage.
See a live sample podcast here.