Feed mode: takes the newest 1-4 episodes of an RSS feed and fetches only a byte ...
https://ton.halowerk.com/v1/feed-loudness-seriesOverview
Feed mode: takes the newest 1-4 episodes of an RSS feed and fetches only a byte range of each enclosure (by default from the middle of MP3 files, from the start for other containers; large ID3 tags are skipped), so every value is an honest sample measurement, not the loudness of the whole episode. Clip mode: measures 2-6 supplied audio files completely.