{"id":10120,"library":"pyopenjtalk-plus","title":"pyopenjtalk-plus","description":"pyopenjtalk-plus is a Python wrapper for OpenJTalk, a Japanese Text-to-Speech (TTS) system. It enhances the original pyopenjtalk with features like automatic dictionary and voice data downloads, customizable voice presets, and improved phoneme generation. The library is actively maintained, currently at version 0.4.1.post8, with frequent minor updates addressing bug fixes and improvements.","status":"active","version":"0.4.1.post8","language":"en","source_language":"en","source_url":"https://github.com/tsukumijima/pyopenjtalk-plus","tags":["TTS","Speech Synthesis","Japanese","OpenJTalk","NLP"],"install":[{"cmd":"pip install pyopenjtalk-plus","lang":"bash","label":"Install stable version"}],"dependencies":[{"reason":"Core dependency for OpenJTalk functionality","package":"pyopenjtalk","optional":false},{"reason":"Required for handling audio data (NumPy arrays)","package":"numpy","optional":false},{"reason":"Used for downloading dictionaries and voice data","package":"requests","optional":false},{"reason":"Provides progress bars for downloads","package":"tqdm","optional":false},{"reason":"Optional, recommended for more accurate phoneme generation","package":"python-mecab-t5m","optional":true},{"reason":"Optional, for saving generated audio to files (e.g., WAV)","package":"soundfile","optional":true},{"reason":"Optional, for playing generated audio directly","package":"pyaudio","optional":true}],"imports":[{"symbol":"pyopenjtalk_plus","correct":"import pyopenjtalk_plus"},{"symbol":"make_phoneme","correct":"from pyopenjtalk_plus import make_phoneme"},{"symbol":"make_audio","correct":"from pyopenjtalk_plus import make_audio"}],"quickstart":{"code":"import pyopenjtalk_plus\nimport os\n\n# Set a dummy variable for demonstration if needed, otherwise rely on default behavior.\n# pyopenjtalk-plus typically manages data download automatically.\n# os.environ['OPENJTALK_DATA_DIR'] = '/path/to/openjtalk_data' # Optional, for custom data path\n\ntext = \"こんにちは、世界。私はAIです。\"\n\n# 1. Get phonemes\nphonemes = pyopenjtalk_plus.make_phoneme(text)\nprint(f\"Phonemes: {phonemes}\")\n\n# 2. Generate audio (returns sample rate and numpy array of audio data)\n# The library will attempt to download necessary dictionaries and voice data on first run.\ntry:\n    sr, y = pyopenjtalk_plus.make_audio(text)\n    print(f\"Audio generated successfully: Sample Rate={sr}, Data shape={y.shape}\")\n\n    # To save the audio to a file, you'd typically use a library like soundfile:\n    # import soundfile as sf\n    # sf.write(\"output.wav\", y, sr)\n    # print(\"Audio saved to output.wav\")\n\nexcept Exception as e:\n    print(f\"Error generating audio: {e}\")\n    print(\"Ensure OpenJTalk dictionaries and voice files are accessible. \\n\"\\\n          \"The library usually downloads them automatically, but network or permissions issues can cause failures.\")","lang":"python","description":"This quickstart demonstrates how to generate phonemes and audio from Japanese text using pyopenjtalk-plus. The library automatically handles the download of OpenJTalk dictionaries and voice data on first use, simplifying setup. Audio output is a NumPy array, requiring external libraries like `soundfile` or `pyaudio` for saving or playback."},"warnings":[{"fix":"Ensure stable internet connection and write permissions. If automatic download fails, you may need to manually download and specify the `OPENJTALK_DATA_DIR` environment variable or `data_dir` parameter in function calls.","message":"pyopenjtalk-plus relies on native OpenJTalk binaries and data (dictionaries, voice files). While the library attempts automatic downloads, network issues, firewall restrictions, or insufficient write permissions in the default data directory can cause failures. This often manifests as 'No such file or directory' errors for `.dic` or `.htsvoice` files.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Install the recommended MeCab binding: `pip install python-mecab-t5m`.","message":"For optimal phoneme generation accuracy, particularly with complex or ambiguous Japanese text, it's highly recommended to install `python-mecab-t5m` (or `mecab-python3`). Without it, the library falls back to a less sophisticated internal MeCab implementation, which might produce less accurate phoneme sequences.","severity":"gotcha","affected_versions":"All versions"},{"fix":"To play audio, use `pyaudio` (e.g., `pip install pyaudio`). To save to a file (like WAV), use `soundfile` (e.g., `pip install soundfile`). Refer to their respective documentation for usage.","message":"The `make_audio` function returns raw audio data as a NumPy array. It does not automatically play the sound or save it to a file. Users need to integrate additional libraries for these functionalities.","severity":"gotcha","affected_versions":"All versions"},{"fix":"Ensure your system has the necessary build tools (e.g., 'Build Tools for Visual Studio' on Windows). Check the `pyopenjtalk` documentation for specific native dependencies.","message":"On some systems (especially Windows), the underlying `pyopenjtalk` dependency might require specific Visual C++ Redistributables or other native build tools if pre-compiled wheels are not available for your Python version/architecture. This can lead to `ImportError: DLL load failed` or compilation errors during installation.","severity":"gotcha","affected_versions":"All versions"}],"env_vars":null,"last_verified":"2026-04-17T00:00:00.000Z","next_check":"2026-07-16T00:00:00.000Z","problems":[{"fix":"Ensure the package is installed: `pip install pyopenjtalk-plus`. If using a virtual environment, ensure it's activated.","cause":"The package was not installed, or the environment is not activated.","error":"ModuleNotFoundError: No module named 'pyopenjtalk_plus'"},{"fix":"Check your internet connection and proxy settings. Ensure your Python environment has write permissions in its site-packages directory or a directory specified by `OPENJTALK_DATA_DIR` environment variable. You can try manually pre-downloading data if needed.","cause":"OpenJTalk dictionary files were not found or successfully downloaded. This often occurs due to network issues, firewall blocks, or insufficient write permissions in the default data directory.","error":"FileNotFoundError: [Errno 2] No such file or directory: '.../OpenJTalk/dic/open_jtalk_dic_utf_8-1.11'"},{"fix":"Ensure you have the latest Microsoft Visual C++ Redistributable installed. Try reinstalling `pyopenjtalk-plus` in a clean virtual environment: `pip uninstall pyopenjtalk-plus pyopenjtalk` then `pip install pyopenjtalk-plus`.","cause":"This error typically occurs on Windows when a required native DLL for the underlying `pyopenjtalk` library is missing or cannot be loaded, often related to Visual C++ Redistributables or a corrupted installation.","error":"ImportError: DLL load failed while importing _openjtalk"},{"fix":"Verify that voice data was successfully downloaded. Ensure network connectivity during the first run. If you've moved data, confirm the `OPENJTALK_DATA_DIR` environment variable points to the correct location. Check the library's data directory for the presence of the voice file.","cause":"The specified voice preset (e.g., 'mei_normal') could not be found. This means the corresponding `.htsvoice` file was not downloaded or is missing.","error":"OpenJTalkError: Cannot find voice: mei_normal"}]}