re-use-semamba-mlx

RE-USE SEMamba Speech Enhancement (MLX)

Pure-MLX conversion of NVIDIA RE-USE, a ~9.6M-parameter SEMamba universal speech-enhancement model. In mlx-speech it cleans a voice reference before VAE conditioning when DramaBox TTS runs with denoise_ref=True, giving the cloning model a clean speaker anchor.

Non-commercial weights. These weights derive from NVIDIA RE-USE, licensed under the NVIDIA Source Code License (non-commercial). See the License section.

Model Details

• Developed by: App Automaton
• Upstream model: nvidia/RE-USE (SEMamba, bidirectional Mamba over STFT magnitude + phase)
• Role: input-side voice-reference denoiser for DramaBox denoise_ref=True. Optional, off by default.
• Conversion: format-only port of the fp32 weights to MLX .safetensors (1416 keys, ~9.6M params). No quantization, no architecture change.
• Runtime: pure MLX on Apple Silicon. The selective scan mirrors the mamba_ssm selective_scan_ref reference math, so no CUDA kernels (mamba-ssm / causal-conv1d) are required.
• Parity: the MLX port matches the torch reference at amplitude-weighted complex correlation 0.9998 (model) and 0.9997 (end-to-end waveform on real speech).

Contents

How to Get Started

Used automatically by DramaBox when you opt in:

import mlx_speech

tts = mlx_speech.tts.load("dramabox")
result = tts.generate(
    "Voice cloning from a noisy reference.",
    reference_audio="noisy_speaker.wav",
    denoise_ref=True,   # cleans the reference with this model first
)

tts.load("dramabox") resolves these weights automatically. To run the enhancer directly:

hf download appautomaton/re-use-semamba-mlx --local-dir models/reuse/mlx

from pathlib import Path
from mlx_speech.generation.reuse import REUSEEnhancer

enhancer = REUSEEnhancer.from_dir(Path("models/reuse/mlx"))
clean = enhancer.enhance(noisy_waveform, in_sr=16000)  # mono in, mono out

Intended Use

Denoising a short voice-reference clip before voice cloning, so the model conditions on a clean speaker/style anchor rather than the recording's noise. The enhancer runs on the reference input, never on generated output, so the TTS model's paralinguistic events (breaths, laughs) are preserved.

Links

• Source code: appautomaton/mlx-speech
• Project page: appautomaton.renocrypt.com/mlx-speech
• Paired model: appautomaton/dramabox-tts-3.3b-bf16-mlx
• More from App Automaton: GitHub · Hugging Face

License

NVIDIA Source Code License (non-commercial). These weights are a format conversion of nvidia/RE-USE and remain governed by NVIDIA's license terms; by downloading or using them you agree to those terms. They may not be used commercially. Set denoise_ref=False (the default) to run DramaBox voice cloning without this model. The mlx-speech runtime code is MIT.