Sign up for Resonate Hosting and verify that your Resonate RSS feed is correct.
Login to app.resonaterecordings.com
Copy the Resonate RSS feed URL from your Resonate dashboard.
Login to your libsyn.com account.
Tap Settings in the top right.
Tap Redirects on the left.
Enter the Resonate RSS feed url in the Feed Redirect URL input.
Now that the show's new RSS feed is setup in Resonate and the old RSS feed is redirected to the new feed, the final step is to update the podcast directories. Follow this guide to update the RSS feed in Apple and Spotify.