Can I edit a Podcast after it is published?

Yes!, you can edit a podcast after you have already published it. This will update the audio on iTunes, Google Play, and all the other places your audio is being streamed from. However, just because you have updated your audio does not mean that the changes will instantly take place. The audio update on the other platforms can take days to register the change... be patient, go get a hot cup of coffee and good things will happen :)