Speaky

Text‑to‑Speech with Voice Cloning made easy with Chatterbox TTS

Generate natural‑sounding speech from plain text—locally on your GPU/CPU using a single, ergonomic command‑line tool.

Features

• Voice cloning from a short audio prompt (optional)
• Built‑in voices accessible via -v NAME (or -v ALL for every voice)
• Emotion control via exaggeration & classifier‑free guidance
• Device auto‑detection — Apple Silicon (mps), CUDA GPUs, or CPU
• Smart sentence chunking (NLTK) to handle long passages gracefully
• Trailing‑silence trimming so outputs end crisply
• Glitch / clipping detection heuristic for cleaner audio
• Verification via transcription (Distil‑Whisper) to catch missing words

🚀 Quickstart (CLI)

Run without installation:

uvx speak "Do or do not. There is no try."  --voice vader

or install first:

uv tool install speaky

speak --file speech.txt  --voice attenborough

Run speak --help for the full list of options.

🐍 Python API

from pathlib import Path
from speaky.core import batch_synthesize

batch_synthesize(
    inputs=[("Hello there!", "greeting")],  # (text, stem)
    output_dir=Path("out"),
)

Examples

https://github.com/user-attachments/assets/f1956d1a-c407-4944-b9f8-a5402f71cbd8

https://github.com/user-attachments/assets/8e6a81df-773c-4d48-876b-4cced0b4f643

https://github.com/user-attachments/assets/2c2884e2-759a-4b1d-884c-c1d5eed9ddf0

https://github.com/user-attachments/assets/2d70a497-b156-40d8-907f-0beb33ea68d6

https://github.com/user-attachments/assets/0ab6195d-ae9e-420e-bde2-719dad772563

https://github.com/user-attachments/assets/aeabd1d9-3839-4190-8460-8ad2e364dd02

Credit

This project is built on top of chatterbox open-source TTS.

Development

Quick Commands

• make init create the environment and install dependencies
• make help see available commands
• make af format code
• make lint run linter
• make typecheck run type checker
• make test run tests
• make check run all checks (format, lint, typecheck, test)
• uv add pkg add a python dependency
• uv run -- python foo/bar.py run arbitrary command in python env

Code Conventions

• Always run make checku after making changes.

Testing

• Use pytest (no test classes).
• Always set match= in pytest.raises.
• Prefer monkeypatch over other mocks.
• Mirror the source-tree layout in tests/.

Exceptions

• Catch only specific exceptions—never blanket except: blocks.
• Don't raise bare Exception.

Python

• Manage env/deps with uv (uv add|remove, uv run -- ...).
• No logging config or side-effects at import time.
• Keep interfaces (CLI, web, etc.) thin; put logic elsewhere.
• Use typer for CLI interfaces, fastapi for web interfaces, and pydantic for data models.