ComfyUI Extension: ComfyUI-HiggsAudio_Wrapper

Authored by ShmuelRonen

Created

Updated

4 stars

A comprehensive ComfyUI wrapper for HiggsAudio v2, enabling high-quality text-to-speech generation with advanced voice cloning capabilities. Supports multiple voice presets and custom reference audio for voice cloning. Requires transformers==4.45.2 for compatibility.

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    README

    ComfyUI-HiggsAudio_Wrapper

    A comprehensive ComfyUI wrapper for HiggsAudio v2, enabling high-quality text-to-speech generation with advanced voice cloning capabilities.

    <img width="2619" height="1468" alt="image" src="https://github.com/user-attachments/assets/7cfd3e77-3481-43cc-a821-fc28837fca29" />

    Features

    • High-Quality Audio Generation: Leverages the powerful HiggsAudio v2 3B parameter model
    • Voice Cloning: Clone voices using reference audio or built-in voice presets
    • Multiple Voice Presets: Includes pre-configured voices (belinda, en_woman, en_man, etc.)
    • Flexible Audio Prioritization: Control whether to use voice presets or custom reference audio
    • Customizable System Prompts: Fine-tune audio generation with scene descriptions and style control
    • GPU Acceleration: Supports CUDA for faster generation
    • ComfyUI Integration: Seamless integration with ComfyUI workflows

    Installation

    Prerequisites

    • Python 3.8+
    • ComfyUI
    • CUDA-compatible GPU (recommended)

    ComfyUI Installation

    1. Clone this repository into your ComfyUI custom_nodes directory:
    cd ComfyUI/custom_nodes
git clone https://github.com/ShmuelRonen/ComfyUI-HiggsAudio_Wrapper.git

    Install Dependencies

    pip install -r requirements.txt

    1. Restart ComfyUI

    2. The nodes will appear under the "Higgs Audio" category

    Usage

    Basic Workflow

    The wrapper provides several nodes that can be chained together:

    1. Load Higgs Audio Model - Loads the generation model
    2. Load Higgs Audio Tokenizer - Loads the audio tokenizer
    3. Load Higgs Audio System Prompt - Configures generation style
    4. Load Higgs Audio Prompt - Sets the text to convert to speech
    5. Higgs Audio Generator - Performs the actual audio generation

    Voice Cloning Options

    Using Voice Presets

    The wrapper includes several built-in voice presets:

    • belinda - Female voice
    • en_woman - English female voice
    • en_man - English male voice
    • mabel - Alternative female voice
    • vex - Character voice
    • chadwick - Male voice
    • broom_salesman - Character voice
    • zh_man_sichuan - Chinese male voice (Sichuan dialect)
    • voice_clone - Use custom reference 30 sec audio

    Using Custom Reference Audio

    1. Set voice preset to voice_clone
    2. Connect reference audio to the reference_audio input
    3. Optionally provide reference text that describes the audio

    Audio Priority Settings

    Control which audio source takes precedence:

    • auto (default) - Uses voice preset if selected, otherwise reference audio
    • preset_dropdown - Always prioritizes dropdown selection over reference audio
    • reference_input - Always prioritizes reference audio over dropdown
    • force_preset - Forces use of preset, ignoring reference audio completely

    Configuration

    What Actually Affects Audio Quality

    Important: System prompts and scene descriptions have minimal effect on HiggsAudio output. Focus on these factors that actually work:

    Voice Quality Control

    • Reference Audio: High-quality voice samples (24kHz+) with clear articulation
    • Voice Presets: Different presets have distinct characteristics - test to find the best fit
    • Reference Text: Clear, well-punctuated text that matches the reference audio

    System Prompt (Minimal Impact)

    Keep system prompts simple since complex scene descriptions are largely ignored:

    Generate audio following instruction.

    Generation Parameters

    • max_new_tokens (128-4096): Controls audio length and pacing
    • temperature (0.0-2.0): Controls voice consistency (0.8 = more stable, 1.2 = more varied)
    • top_p (0.1-1.0): Affects pronunciation variation (0.9-0.95 recommended)
    • top_k (-1-100): Fine-tunes voice characteristics (50 = default)
    • device: auto/cuda/cpu (auto = recommended)

    File Structure

    ComfyUI-HiggsAudio_Wrapper/
├── __init__.py                 # Node registration
├── nodes.py                    # Main node implementations
├── requirements.txt            # Python dependencies
├── voice_examples/             # Voice preset files
│   ├── config.json            # Voice preset configuration
│   ├── en_woman.wav           # Female English voice
│   ├── en_man.wav             # Male English voice
│   └── ...                    # Other voice presets
└── boson_multimodal/          # HiggsAudio engine
    └── ...

    Realistic Expectations

    What HiggsAudio Does Well

    • Voice Cloning: Excellent at replicating voice characteristics from reference audio
    • Speech Quality: Generates natural-sounding speech with good pronunciation
    • Multiple Voices: Built-in voice presets for different character types
    • Consistency: Maintains voice characteristics across longer text

    Current Limitations

    • Scene Control: System prompts for acoustic environments (reverb, background sounds) have minimal effect
    • Emotional Control: Limited ability to control emotional expression through text prompts
    • Background Audio: Cannot generate environmental sounds or music
    • Real-time: Requires processing time, not suitable for real-time applications

    Best Use Cases

    • Voice-over generation with consistent character voices
    • Audiobook narration with cloned voices
    • Character voices for games or animations
    • Text-to-speech with specific voice characteristics

    For acoustic effects like reverb or background sounds, consider post-processing with audio editing software.

    Troubleshooting

    Common Issues

    Poor Audio Quality

    • Use higher quality reference audio (24kHz+ recommended)
    • Try different voice presets to find the best match
    • Adjust temperature (0.8 for stability, 1.2 for variation)
    • Ensure reference text matches the reference audio content

    "audio_base64 is None" Error

    • Ensure reference audio is properly formatted
    • Check that voice preset files exist in voice_examples/
    • Verify audio file is not corrupted

    Inconsistent Voice Output

    • Lower the temperature parameter (try 0.8)
    • Use higher quality reference audio
    • Ensure reference audio has consistent background noise levels

    CUDA Out of Memory

    • Reduce max_new_tokens
    • Use device: cpu instead of auto/cuda
    • Close other GPU-intensive applications

    Model Loading Issues

    • Ensure stable internet connection for model download
    • Check available disk space (models are several GB)
    • Verify transformers version compatibility

    Performance Tips

    1. First Run: Model downloading may take time
    2. GPU Memory: 8GB+ VRAM recommended for optimal performance
    3. Caching: Models are cached after first load for faster subsequent runs
    4. Voice Quality: Use high-quality reference audio for best results
    5. Parameter Tuning: Lower temperature (0.8) for consistent voice, higher (1.2) for variation
    6. Text Formatting: Use proper punctuation for natural speech rhythm

    API Reference

    HiggsAudio Node Inputs

    Required

    • MODEL_PATH: Path to HiggsAudio model
    • AUDIO_TOKENIZER_PATH: Path to audio tokenizer
    • system_prompt: System prompt for generation control
    • prompt: Text to convert to speech
    • max_new_tokens: Maximum tokens to generate
    • temperature: Sampling temperature
    • top_p: Nucleus sampling parameter
    • top_k: Top-k sampling parameter
    • device: Computation device

    Optional

    • voice_preset: Voice preset selection
    • reference_audio: Custom reference audio
    • reference_text: Text corresponding to reference audio
    • audio_priority: Audio source prioritization

    Output

    • output: Generated audio in ComfyUI format
    • used_voice_info: Information about which voice source was used

    Requirements

    See requirements.txt for complete list:

    • torch==2.5.1
    • torchaudio==2.5.1
    • transformers>=4.45.1,<4.47.0
    • librosa
    • And others...

    Third-Party Licenses

    The boson_multimodal/audio_processing/ directory contains code derived from third-party repositories, primarily from xcodec. Please see the LICENSE in that directory for complete attribution and licensing information.

    Contributing

    1. Fork the repository
    2. Create a feature branch
    3. Make your changes
    4. Add tests if applicable
    5. Submit a pull request

    Support

    For issues and questions:

    • Open an issue on GitHub
    • Check existing issues for solutions
    • Provide detailed error messages and system information

    Acknowledgments

    • HiggsAudio team for the underlying model
    • ComfyUI community for the framework
    • Contributors and testers

    Note: This wrapper requires significant computational resources. A CUDA-compatible GPU with 8GB+ VRAM is recommended for optimal performance.