You can upload a new audio file from your episode’s edit page. This can be done by clicking into the area where you originally uploaded the episode audio.
Once you save a new file it will be updated and any future downloads will use the new audio. The original file is then automatically deleted.
Q: How soon will podcast directories update my show with the new episode file?
A: This change will be reflected immediately in your RSS feed and anywhere you have your episode embedded. Podcast directories will also reflect the change but updating timeframes vary. Changing the file name can help some podcast directories notice the file change a little sooner. Rest assured that if you've made the change here on your Simplecast account, it will update everywhere your podcast is listed on.