sherpa-onnx-tts

Offline text-to-speech generation without internet access uses sherpa-onnx to synthesize speech locally on your machine. You configure environment variables for the runtime and model directories, then execute a wrapper to produce audio output entirely offline.

Local TTS synthesis works consistently across macOS, Linux, and Windows environments. The cross-platform wrapper provides a unified interface for offline speech generation, allowing you to integrate voice synthesis into desktop applications or server workflows on any supported operating system.

Offline TTS with sherpa-onnx requires setting two environment variables: SHERPA_ONNX_RUNTIME_DIR for the runtime directory and SHERPA_ONNX_MODEL_DIR for the voice model directory. These paths allow the wrapper to locate the necessary runtime files and model data for audio synthesis.

Voice tone customization in offline speech synthesis is achieved by downloading and switching voice models. You place different models in the configured model directory, allowing the local TTS wrapper to produce varied tones and voices without requiring an internet connection.

The best way to embed local TTS into a desktop application is using the provided wrapper in the skill folder. After installing the sherpa-onnx runtime and voice models, you integrate the wrapper directly into your scripts or apps for offline voice generation.

Offline TTS generation does not require cloud services or API keys. It performs local speech synthesis entirely without internet access using sherpa-onnx, making it suitable for secure environments, privacy-sensitive applications, and research workflows on desktops or servers.