duplexjev-vllm

vLLM plugin for DuplexJev speech-decision models, such as adventists-ai/DuplexJev-4B.

pip install "vllm[audio]>=0.29" duplexjev-vllm
vllm serve adventists-ai/DuplexJev-4B --max-model-len 4096

The plugin registers the architecture DuplexJevForConditionalGeneration through vLLM's vllm.general_plugins entry point, so nothing needs to be imported by hand. It adds the Qwen3-ASR audio encoder and the matching preprocessing (128-bin log-mel, clips padded to whole audio tokens) to vLLM's Ultravox implementation; the connector and the LLM run on vLLM's own code.

Each question is one request with max_tokens=1; the answer is the next-token distribution over the option letters. A client that asks several questions about one clip concurrently is in examples/vllm_client.py.

modeling_qwen3_asr_encoder.py is a standalone port of the Qwen3-ASR audio encoder from Hugging Face transformers (Apache-2.0, Copyright the Qwen team, Alibaba Cloud, and the HuggingFace team). The rest of this package is Apache-2.0, Copyright Adventists.ai.