AAC to WAV for Podcasts

Podcasters hit this specific conversion because HLS streaming segments is where the AAC came from — a remote guest, a field recording, a clip — and a bare .aac stream lacks the container index that tells software its duration, so players won't list it and editors import it wrong. For a show you need WAV, so the AAC-to-WAV step is part of the edit, not an afterthought.

Edit in WAV, publish in something lossy. Keeping the working file lossless means your cuts, levelling, noise reduction, and EQ all happen on raw samples — and only the final episode export is lossy, applied once to the finished mix.

Podcast bitrates are lower than most people assume, deliberately. 128 kbps stereo is the widely used standard, and 64–96 kbps mono is entirely respectable for pure speech — it roughly halves the download for every listener, which adds up across a back catalogue and matters to anyone on limited mobile data. Reserve 192 kbps and above for shows where music genuinely carries the experience.

Mono is the decision most worth revisiting. If your episode is voices with no meaningful stereo image — which describes most interview and solo shows — mono at 96 kbps is perceptually equivalent to stereo at 192 and half the size. Publishing stereo by default is a habit, not a requirement. And archive the lossless edit: social clips, best-of segments, and fixes should always be cut from that, never from the published file.

WAV runs about 10 MB per minute against AAC's 1.2, so the file grows roughly 8×. Irrelevant for a session file; keep the original for archiving. No "HD upscaling" is possible from a lossy source. The audio is identical — WAV just stops it degrading further.

The AAC on your drive almost certainly started life in HLS streaming segments, and a bare .aac stream lacks the container index that tells software its duration, so players won't list it and editors import it wrong. WAV is the destination when you need uncompressed, edit-ready audio that every DAW and editor accepts. Yes, it gets larger — around 8× — since you're unpacking the audio rather than compressing it. Keep the AAC for storage and use the WAV as the working copy. One honest note on this exact pair: AAC is already lossy, so moving to WAV cannot restore detail the AAC encoder discarded — it hands you an uncompressed container, not better audio, and the value is a loss-free chain from here on.