PhantomStep: The Ultimate Music Generation Foundation Model �

� Model Description

PhantomStep, crafted by GhostAI, is the pinnacle of open-source music generation. Building on the foundation of ACE-Step, PhantomStep redefines excellence with a reengineered diffusion-based architecture, GhostAI's proprietary Spectral Compression AutoEncoder (SCAE), and an optimized transformer backbone. Our model delivers unparalleled generation speed, musical coherence, and creative control, leaving competitors in the dust. �

Key Features:

� 20× faster than LLM-based baselines (15s for 4-minute tracks on A100)
� Flawless coherence in melody, harmony, and rhythm
� Full-song generation with precise duration control
� Multilingual text-to-music with enhanced vocal synthesis
� Upcoming: Fine-grained style control and genre-specific optimizations

� Uses

Direct Use

PhantomStep empowers creators to:

✨ Craft original music from natural language prompts
� Remix tracks with seamless style transfers
✍️ Edit lyrics and vocals with precision

Downstream Use

A foundation for innovation:

�️ Advanced voice cloning
� Genre-specific music generators (e.g., trap, classical, K-pop)
�️ Professional music production suites
� AI-driven creative assistants

Out-of-Scope Use

PhantomStep must not be used for:

� Unauthorized reproduction of copyrighted material
⛔ Generating harmful or offensive content
�️‍♂️ Misrepresenting AI-generated works as human creations

� How to Get Started

Dive into the code and demos:

� Hugging Face Repository
� Demo Space (Coming Soon)

⚡ Hardware Performance

Device	27 Steps	60 Steps
NVIDIA A100	30.50x ⚡	14.10x ⚡
RTX 4090	38.20x �	17.85x �
RTX 3090	15.30x �	8.12x �
M2 Max	3.15x �	1.45x �

RTF (Real-Time Factor) shown - higher values indicate faster generation

�️ Optimizations in Progress

PhantomStep is actively addressing the following limitations:

� Output Consistency: Reducing "gacha-style" variability with stabilized random seeds and adaptive sampling.
� Genre Performance: Enhanced training for niche genres (e.g., Chinese rap, avant-garde jazz).
� Vocal Quality: Refined vocal synthesis for natural, expressive outputs.
� Long-Form Coherence: Improved structural integrity for tracks >5 minutes.
�️ Control Granularity: Introducing precise controls for tempo, instrumentation, and dynamics.

� Ethical Considerations

GhostAI commits to responsible AI:

✅ Ensure originality of generated works
� Disclose AI involvement in outputs
� Respect cultural nuances and intellectual property
� Prohibit harmful or unethical content generation

� Model Details

Developed by: GhostAI
Model type: Diffusion-based music generation with transformer conditioning
License: Apache 2.0
Resources:

� Project Page (Coming Soon)
� Hugging Face Repository
� Demo Space (Coming Soon)

� Citation

@misc{ghostai2025phantomstep,
  title={PhantomStep: The Ultimate Music Generation Foundation Model},
  author={GhostAI Team},
  howpublished={\url{https://huggingface.co/ghostai1/GHOSTSONA}},
  year={2025},
  note={Hugging Face repository}
}

� Acknowledgements

Built on the shoulders of ACE Studio and StepFun. GhostAI takes it to the next level. �