---
license: apache-2.0
base_model: OpenMOSS-Team/MOSS-SoundEffect
tags:
- mlx
- audio
- sound-effects
- text-to-audio
---

# MOSS-SoundEffect — MLX selective 4-bit (Swift-compatible)

Selective 4-bit (affine, group size 64) MLX conversion of
[`OpenMOSS-Team/MOSS-SoundEffect`](https://huggingface.co/OpenMOSS-Team/MOSS-SoundEffect),
a sound-effect / ambient generator on the MossTTSDelay architecture.

**Selective quant:** `lm_heads` and the input embeddings are kept **dense**
(full precision); only the transformer body is 4-bit. This matches the module
layout in [`mlx-audio-swift`](https://github.com/Blaizzy/mlx-audio-swift)'s
`MossTTSModel`, which defines those layers as plain (non-quantized) modules — a
fully-4-bit checkpoint fails to load there with a size mismatch. ~16 GB bf16 →
~5.4 GB.

## Usage (Swift)

Requires the patched fork [`nullic/mlx-audio-swift`](https://github.com/nullic/mlx-audio-swift)
(branch `trails`): adds float32 audio-token sampling + quantized-checkpoint
loading to `MossTTSModel`. Pair with the **original** audio tokenizer
[`OpenMOSS-Team/MOSS-Audio-Tokenizer`](https://huggingface.co/OpenMOSS-Team/MOSS-Audio-Tokenizer).

Sampling: audio temperature 1.7, top-p 0.8, top-k 25 (the upstream reference
settings; the fork's float32 sampling is what makes 1.7 coherent rather than noise).

## License

Apache-2.0, inherited from the base model. Conversion only; no weights authored here.