
Fun is Alibaba's open-source, end-to-end automatic speech recognition toolkit supporting multilingual ASR, voice activity detection, punctuation restoration, and speaker diarization with real-time streaming capabilities.

[Core Function] Fun-ASR MTL is the multi-language variant for async recorded speech recognition. [Strengths] Same parameters as fun-asr with multi-language tuning. [Best For] Mixed-language or international audio archives. [Limitations] Do NOT send more than one file per request. [Routing] Choose fun-asr for general use; fun-asr-mtl when the source audio is explicitly multi-language.

[Core Function] Fun-ASR transcribes a single public audio file asynchronously. [Strengths] Hot-word vocabulary, optional speaker diarization, channel selection, and language hints. [Best For] Batch transcription of recordings up to 12 hours. [Limitations] Do NOT send more than one file per request. [Routing] Use fun-asr-mtl when multi-language optimization is preferred.