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NS_E_INPUT_WAVFORMAT_MISMATCH
NS_E_INPUT_WAVFORMAT_MISMATCH: the failing boundary
NS_E_INPUT_WAVFORMAT_MISMATCH (0xC00D1BA2) means All the source .wav files must have the same format. The important boundary is multi-file audio format consistency; do not replace this result with a broader “Windows Media failed” diagnosis.
What this result proves
This code proves that source WAV files in the operation do not share the same audio format. It does not, by itself, prove a codec, permissions, network, device, or media problem outside that boundary. Preserve the first lower-level result when one exists, because later Player or Encoder errors can hide the original cause.
Evidence and focused verification
Record each wav format tag, channels, sample rate and bit depth; convert or replace the mismatching source before retrying. Keep the media object, endpoint, profile, or device identity fixed while changing only that rejected precondition. A successful retest should pass this exact boundary; a different HRESULT from a later stage is new evidence, not recurrence of NS_E_INPUT_WAVFORMAT_MISMATCH.
Technical references
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