Once you've imported your podcast to Omny Studio, you can easily migrate to Omny Studio without losing your existing subscribers. All you need to do is tell Apple Podcasts and the other podcast directories and apps to pull from your new RSS feeds. This is done by applying a re-direct from your old feed to your new feed.
To move from Soundcloud:
1. Log into your SoundCloud account and click “Settings”
2. Select the “Content” tab
3. Copy and paste your Omny RSS feed into the “Subscriber Redirect” field
4. Click “Save Changes”
Soundcloud will now redirect your feed to Omny Studio.
Note: Although iTunes will normally pick up on changes within a few days, you should leave the old feed in place for a few weeks to ensure all subscribers are moved across. Free Soundcloud accounts will stay open indefinitely with the redirect in place.