feat: add NeuTTS optional skill + local TTS provider backend
* feat(skills): add bundled neutts optional skill Add NeuTTS optional skill with CLI scaffold, bootstrap helper, and sample voice profile. Also fixes skills_hub.py to handle binary assets (WAV files) during skill installation. Changes: - optional-skills/mlops/models/neutts/ — skill + CLI scaffold - tools/skills_hub.py — binary asset support (read_bytes, write_bytes) - tests/tools/test_skills_hub.py — regression tests for binary assets * feat(tts): add NeuTTS as local TTS provider backend Add NeuTTS as a fourth TTS provider option alongside Edge, ElevenLabs, and OpenAI. NeuTTS runs fully on-device via neutts_cli — no API key needed. Provider behavior: - Explicit: set tts.provider to 'neutts' in config.yaml - Fallback: when Edge TTS is unavailable and neutts_cli is installed, automatically falls back to NeuTTS instead of failing - check_tts_requirements() now includes NeuTTS in availability checks NeuTTS outputs WAV natively. For Telegram voice bubbles, ffmpeg converts to Opus (same pattern as Edge TTS). Changes: - tools/tts_tool.py — _generate_neutts(), _check_neutts_available(), provider dispatch, fallback logic, Opus conversion - hermes_cli/config.py — tts.neutts config defaults --------- Co-authored-by: unmodeled-tyler <unmodeled.tyler@proton.me>
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15 changed files with 1359 additions and 24 deletions
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@ -2,10 +2,11 @@
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"""
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Text-to-Speech Tool Module
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Supports three TTS providers:
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Supports four TTS providers:
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- Edge TTS (default, free, no API key): Microsoft Edge neural voices
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- ElevenLabs (premium): High-quality voices, needs ELEVENLABS_API_KEY
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- OpenAI TTS: Good quality, needs OPENAI_API_KEY
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- NeuTTS (local, free, no API key): On-device TTS via neutts_cli, needs neutts installed
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Output formats:
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- Opus (.ogg) for Telegram voice bubbles (requires ffmpeg for Edge TTS)
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@ -72,6 +73,7 @@ DEFAULT_ELEVENLABS_MODEL_ID = "eleven_multilingual_v2"
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DEFAULT_ELEVENLABS_STREAMING_MODEL_ID = "eleven_flash_v2_5"
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DEFAULT_OPENAI_MODEL = "gpt-4o-mini-tts"
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DEFAULT_OPENAI_VOICE = "alloy"
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DEFAULT_NEUTTS_VOICE = "" # empty = use neutts_cli default voice
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DEFAULT_OUTPUT_DIR = str(Path(os.getenv("HERMES_HOME", Path.home() / ".hermes")) / "audio_cache")
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MAX_TEXT_LENGTH = 4000
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@ -258,6 +260,59 @@ def _generate_openai_tts(text: str, output_path: str, tts_config: Dict[str, Any]
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return output_path
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# ===========================================================================
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# NeuTTS (local, on-device TTS via neutts_cli)
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# ===========================================================================
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def _check_neutts_available() -> bool:
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"""Check if neutts_cli is importable (installed locally)."""
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try:
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import importlib.util
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return importlib.util.find_spec("neutts_cli") is not None
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except Exception:
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return False
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def _generate_neutts(text: str, output_path: str, tts_config: Dict[str, Any]) -> str:
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"""Generate speech using the local NeuTTS CLI.
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Calls neutts_cli.cli synth via subprocess. Outputs WAV by default;
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the caller handles conversion to .ogg for Telegram if needed.
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"""
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import sys
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neutts_config = tts_config.get("neutts", {})
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voice = neutts_config.get("voice", DEFAULT_NEUTTS_VOICE)
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# NeuTTS outputs WAV natively — use a .wav path for generation,
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# let the caller convert to the final format afterward.
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wav_path = output_path
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if not output_path.endswith(".wav"):
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wav_path = output_path.rsplit(".", 1)[0] + ".wav"
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cmd = [sys.executable, "-m", "neutts_cli.cli", "synth", "--text", text, "--out", wav_path]
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if voice:
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cmd.extend(["--voice", voice])
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result = subprocess.run(cmd, capture_output=True, text=True, timeout=120)
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if result.returncode != 0:
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stderr = result.stderr.strip()
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raise RuntimeError(f"NeuTTS synthesis failed: {stderr or 'unknown error'}")
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# If the caller wanted .mp3 or .ogg, convert from WAV
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if wav_path != output_path:
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ffmpeg = shutil.which("ffmpeg")
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if ffmpeg:
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conv_cmd = [ffmpeg, "-i", wav_path, "-y", "-loglevel", "error", output_path]
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subprocess.run(conv_cmd, check=True, timeout=30)
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os.remove(wav_path)
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else:
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# No ffmpeg — just rename the WAV to the expected path
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os.rename(wav_path, output_path)
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return output_path
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# ===========================================================================
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# Main tool function
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# ===========================================================================
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@ -342,26 +397,45 @@ def text_to_speech_tool(
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logger.info("Generating speech with OpenAI TTS...")
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_generate_openai_tts(text, file_str, tts_config)
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elif provider == "neutts":
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if not _check_neutts_available():
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return json.dumps({
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"success": False,
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"error": "NeuTTS provider selected but neutts_cli is not installed. "
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"Install the NeuTTS skill and run the bootstrap helper first."
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}, ensure_ascii=False)
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logger.info("Generating speech with NeuTTS (local)...")
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_generate_neutts(text, file_str, tts_config)
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else:
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# Default: Edge TTS (free)
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# Default: Edge TTS (free), with NeuTTS as local fallback
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edge_available = True
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try:
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_import_edge_tts()
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except ImportError:
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edge_available = False
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if edge_available:
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logger.info("Generating speech with Edge TTS...")
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try:
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loop = asyncio.get_running_loop()
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import concurrent.futures
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with concurrent.futures.ThreadPoolExecutor(max_workers=1) as pool:
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pool.submit(
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lambda: asyncio.run(_generate_edge_tts(text, file_str, tts_config))
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).result(timeout=60)
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except RuntimeError:
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asyncio.run(_generate_edge_tts(text, file_str, tts_config))
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elif _check_neutts_available():
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logger.info("Edge TTS not available, falling back to NeuTTS (local)...")
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provider = "neutts"
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_generate_neutts(text, file_str, tts_config)
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else:
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return json.dumps({
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"success": False,
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"error": "Edge TTS not available. Run: pip install edge-tts"
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"error": "No TTS provider available. Install edge-tts (pip install edge-tts) "
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"or set up NeuTTS for local synthesis."
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}, ensure_ascii=False)
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logger.info("Generating speech with Edge TTS...")
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# Edge TTS is async, run it
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try:
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loop = asyncio.get_running_loop()
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import concurrent.futures
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with concurrent.futures.ThreadPoolExecutor(max_workers=1) as pool:
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pool.submit(
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lambda: asyncio.run(_generate_edge_tts(text, file_str, tts_config))
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).result(timeout=60)
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except RuntimeError:
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asyncio.run(_generate_edge_tts(text, file_str, tts_config))
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# Check the file was actually created
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if not os.path.exists(file_str) or os.path.getsize(file_str) == 0:
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@ -370,9 +444,10 @@ def text_to_speech_tool(
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"error": f"TTS generation produced no output (provider: {provider})"
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}, ensure_ascii=False)
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# Try Opus conversion for Telegram compatibility (Edge TTS only outputs MP3)
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# Try Opus conversion for Telegram compatibility
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# Edge TTS outputs MP3, NeuTTS outputs WAV — both need ffmpeg conversion
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voice_compatible = False
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if provider == "edge" and file_str.endswith(".mp3"):
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if provider in ("edge", "neutts") and not file_str.endswith(".ogg"):
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opus_path = _convert_to_opus(file_str)
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if opus_path:
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file_str = opus_path
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@ -444,6 +519,8 @@ def check_tts_requirements() -> bool:
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return True
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except ImportError:
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pass
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if _check_neutts_available():
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return True
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return False
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