https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/issues/295#issuecomment-4241577603

tells us that the Specification as of April13, 2026, incorrectly includes a microphone.  There is no microphone.  The code here was ChatGPT's Codex trying to find the correct pins, a task that could never be accomplished.  This exercise documents the attempts for posterity.