ComfyUI Node: Piper TTS

Piper TTS:

PiperTTS is a powerful text-to-speech (TTS) node designed to convert written text into high-quality spoken audio. This node leverages advanced voice synthesis models to generate natural-sounding speech, making it an invaluable tool for AI artists looking to add a vocal element to their projects. Whether you are creating voiceovers for animations, generating audio for interactive applications, or simply experimenting with TTS technology, PiperTTS provides a seamless and efficient way to produce professional-grade audio. The node supports multiple voices and quality settings, allowing you to customize the output to suit your specific needs. By automating the process of downloading and managing voice models, PiperTTS ensures that you have access to the latest and most accurate TTS capabilities without the need for extensive technical knowledge.

Piper TTS Input Parameters:

text

The text parameter is a string input that contains the written content you want to convert into speech. This parameter is essential as it forms the basis of the audio output. The text can be multiline, allowing for longer passages to be synthesized. It is important to ensure that the text is not empty, as the node will raise a ValueError if no text is provided. There are no specific minimum or maximum values for the length of the text, but practical limits may be imposed by the system's memory and processing capabilities.

voice

The voice parameter allows you to select the desired voice for the TTS output. This parameter is populated with a list of available voices, excluding quality specifications. The choice of voice significantly impacts the character and tone of the synthesized speech. The available voices are dynamically retrieved from the TTS voice repository, ensuring you have access to a variety of options. There is no default value, so you must select a voice from the provided list.

quality

The quality parameter determines the quality level of the synthesized speech. It offers three options: "high," "medium," and "low," with "high" being the default setting. The quality setting affects the clarity and naturalness of the audio output, with higher quality settings providing more refined and realistic speech at the cost of increased processing time and resource usage. Selecting the appropriate quality level depends on the specific requirements of your project and the available computational resources.

Piper TTS Output Parameters:

audio_path

The audio_path parameter is a string output that provides the file path to the generated audio file. This path points to a .wav file containing the synthesized speech based on the input text, voice, and quality settings. The audio file is saved in a designated output directory, making it easy to locate and use in your projects. The audio_path is crucial for accessing and utilizing the generated audio, whether for playback, further processing, or integration into other applications.

Piper TTS Usage Tips:

• Ensure that the text parameter is not empty to avoid errors and ensure meaningful audio output.
• Experiment with different voice options to find the one that best suits the tone and style of your project.
• Adjust the quality setting based on your needs; use "high" for the best audio quality and "low" for faster processing times.
• Check the output directory specified in the audio_path to easily locate and manage your generated audio files.

Piper TTS Common Errors and Solutions:

Text cannot be empty.

• Explanation: This error occurs when the text parameter is left empty.
• Solution: Ensure that you provide a non-empty string for the text parameter.

<voice_with_quality> does not exist. Refer to https://github.com/rhasspy/piper/blob/master/VOICES.md

• Explanation: This error indicates that the specified combination of voice and quality does not match any available models.
• Solution: Verify the available voices and quality settings from the provided URL and select a valid combination.

Model download failed.

• Explanation: This error occurs if there is an issue downloading the TTS model files.
• Solution: Check your internet connection and ensure that the base URL for model downloads is accessible. Retry the operation after resolving any connectivity issues.