The meaning of the word “Podcast” has been watered down in the
last years, but we follow the old-school definition that
it’s not a podcast if it doesn’t have an RSS feed!
Import
When you have imported an existing podcast you will see a feed already created for you (with a name matching the MIME type of the audio files) which you can rename or configure according to your needs.
In case your existing podcast has several feeds (to distribute the episodes
based on audio encoding), you can import all of them and keep publishing them.
New podcast
When you start a new podcast, you have to create a first episode and upload an audio file for this episode, before you can add and publish an RSS feed.
Each podcast can have more than one feed, but each feed can only reference
audio files of one MIME type.