sherpa-onnx-tts

Offline text-to-speech synthesis runs locally via a command-line interface, passing text to generate a WAV audio file without cloud connectivity. It uses sherpa-onnx runtimes to produce output.

Yes, local TTS audio file generation is cross-platform and applicable to offline workflows on macOS, Linux, and Windows. The command-line driven speech synthesis produces WAV files across these operating systems.

Before using sherpa-onnx for speech synthesis, you need to define the SHERPA_ONNX_RUNTIME_DIR and SHERPA_ONNX_MODEL_DIR environment variables. These provide the required runtime and model directories for the CLI.

Offline local TTS works entirely without an internet connection, synthesizing speech from text locally to eliminate reliance on cloud services. This approach preserves privacy by keeping all processing on your machine.

Batch voice generation for multiple text inputs is automated using the CLI-based synthesis tool, which writes output WAV files for workflows. You can script the command-line interface to process text inputs sequentially.

The best way to integrate text-to-speech into an offline voice-enabled app is using a local CLI tool that writes output WAV files. This approach suits prototyping and batch generation by providing direct local audio file output.