RSS apps can play AAC—so why do hosting contracts still assume MP3 enclosures?
Searchers look for podcast RSS MP3, dynamic ad insertion AAC, Anchor export quirks, XiaoYuZhou MP3, and car podcast stutter. Historical compatibility plus ad-stitch pipelines still treat MP3 as the default test target: ID3 chapters, trailing silence, and bitrate discontinuities are easier to script-check on MP3 timelines. If you already limited and loudness-treated AAC in the DAW, avoid edit-in-place on MP3 followed by another MP3 export—that stacked lossy loop turns mush fast. Freeze one web preset, stamp version strings and master-bus hashes into metadata, and keep rejection screenshots tied to the exact generation you re-uploaded. Music beds, phone taps, and co-host audio still need rights and privacy review; MP3 does not bypass clearance. Some international storefronts also want plain-language encoding receipts that non-engineer stakeholders can open, and MP3 still wins that hallway test.
Release order: AAC scratch to distribution MP3 to hosting smoke test
- Before exporting AAC from the host, freeze sample rate and loudness targets and strip unnecessary bus FX; after browser MP3 creation, read integrated loudness and peaks on the hosting preview bar or a trusted meter.
- Write episode IDs, explicit-content flags, and version strings into ID3, keep ad-insert and clean masters on separate object keys, and never publish unchecked peaks to a public CDN prefix.
- Regression-test on car Bluetooth and a low-end Android podcast client, log vendor rejection reasons with screenshots, and fix issues on the AAC master bus instead of endlessly re-baking MP3 alone.