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# qwen-tts (`--backend qwen`)
Runs the [qwen-tts](https://pypi.org/project/qwen-tts/) `qwen-tts-demo` server, one model at a time. Installs into its own managed venv, `app/envs/qwen`.
Run all commands from the project root (next to `audiobook.py`).
## Requirements
- Python 3.12+ (as for the app itself)
## Install
```bash
python3 -m venv app/envs/qwen
app/envs/qwen/bin/pip install -U qwen-tts
```
Model weights download from HuggingFace automatically on first server start.
## Run the server
Start the demo matching what you want to do:
```bash
# Built-in speakers (pick a speaker with --voice in TAG)
app/envs/qwen/bin/qwen-tts-demo Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice --ip 127.0.0.1 --port 7860
# Voice cloning (needs a reference clip)
app/envs/qwen/bin/qwen-tts-demo Qwen/Qwen3-TTS-12Hz-1.7B-Base --ip 127.0.0.1 --port 7860
# Voice design (style described with --instructions in TAG)
app/envs/qwen/bin/qwen-tts-demo Qwen/Qwen3-TTS-12Hz-1.7B-VoiceDesign --ip 127.0.0.1 --port 7860
```
- Add `--no-flash-attn` if FlashAttention is not installed.
- For cloning, reference clips of 10-15 seconds of clean speech work best (pass with `--clone <wav>`).
## Use it
```bash
python audiobook.py --backend qwen --api-url http://127.0.0.1:7860
```
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