Podcast mixing isn't music mixing. No drop, no 808 — just a voice that needs to be clear and loud enough for a commute. Most podcasters either master too quiet or slam through a limiter to -8 LUFS, pumping every breath. MixDiagnose measures against the loudness targets every platform enforces and tells you whether your voice is getting normalized down, crushed, or sitting right.
80–200 Hz: Voice warmth. Too much sounds boomy, too little thin. We flag where your low-end sits. 300–800 Hz: The "boxy" zone where cheap USB mics pile up; a 4–6 dB dip around 400 Hz separates home-recorded from studio. 2–4 kHz: Where consonants live — the sounds that make speech understandable on phones. We flag when presence drops below the intelligibility threshold. 5–10 kHz: Sibilance territory. Sharp S and T sounds spike here; over-de-essing sounds lispy, under-de-essing pierces. We detect the peaks so you can calibrate.
Ignoring LUFS targets: Spotify normalizes to -14, Apple to -16, YouTube to -14. Deliver at -8 and every platform turns you down. We give the exact normalization delta.
Over-compressing: A 15:1 ratio squashes breaths to word level — fatigue in five minutes. We measure crest factor and flag when compression kills the performance. Room tone left in: AC hum at 60 Hz, fluorescent buzz at 120 Hz — you stopped hearing it, listeners didn't. We detect noise below 100 Hz separately from voice. Inconsistent host levels: One at -16, the other at -22. We flag swings exceeding 3 LU.
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