James Cridland@neil Two great questions!
Most commonly-used audio format is MP3, which is playable everywhere. Buzzsprout, one of the biggest podcast hosts in the world, defaults to 96k mono (44.1 kHz) files. That is just fine for most people.
For a long while, WTF with Marc Maron was 48kbps mono (22.05kHz), as was Podnews Daily. As long as you make it loud enough (-14 LUFS) then most people would be just fine with 48kbps mono. Rather annoyingly, 48kbps isn't in this old list I compiled. I wonder if it's worthwhile recompiling them all?
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