Audio Mastering for Podcast Distribution
Podcast audio needs to meet platform loudness standards and sound consistent across episodes. Learn the mastering chain for professional podcast quality.
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Why Podcast Mastering Matters
Listeners switch between podcasts on the same playlist. If your episode is significantly louder or quieter than others, listeners will either reach for the volume knob or skip your show. Mastering ensures consistent loudness and clarity across all episodes and platforms.
The Mastering Chain
Apply these processing steps in order: 1) EQ to correct any tonal imbalances from recording (reduce boominess around 200-400 Hz, add clarity at 3-5 kHz). 2) Compression to reduce dynamic range — a 3:1 ratio with medium attack and release works for speech. 3) Limiting to catch any remaining peaks and bring the overall loudness up. 4) Loudness normalization to the target standard.
Platform Loudness Standards
Apple Podcasts targets -16 LUFS (Loudness Units Full Scale). Spotify normalizes to -14 LUFS. YouTube targets -14 LUFS. The safest target is -16 LUFS — platforms that normalize to a louder target will increase your volume slightly, which is better than being turned down (which can introduce artifacts).
Mono vs Stereo
Most podcast content should be delivered in mono. Two reasons: it halves the file size, and stereo information in voice recordings adds no value for listeners using a single earbud or car speaker. Exception: podcasts with music segments or spatial audio design elements benefit from stereo.
File Format and Quality
MP3 at 128 kbps mono (or 192 kbps stereo) is the standard for podcast distribution. AAC at 96-128 kbps provides better quality at the same file size but has slightly less universal support. Include ID3 tags: title, artist, album (podcast name), track number (episode number), genre (Podcast), and artwork (3000x3000 JPEG).
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