Most speech-to-text is benchmarked on audio that looks nothing like a WhatsApp voice note. The standard evaluation sets are read speech, broadcast news, or recorded interviews: single speaker, decent microphone, one language, quiet room, speaker aware they are being recorded. A WhatsApp voice n...

Source: [Dev.to](https://dev.to/talha_hussain/why-whatsapp-voice-notes-break-general-purpose-transcription-4nfp)

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