MOSS-TTS-v1.5 BF16 and Q8_0 GGUF for OpenMOSS
GGUF weights for OpenMOSS-Team/MOSS-TTS-v1.5, converted for the OpenMOSS C++/GGML runtime.
Precision correction
All files in this revision are FP16-free. The full backbone follows the official BF16 checkpoint. The recommended compact backbone uses Q8_0 matrices, retains the token embedding table as BF16, and keeps normalization tensors in FP32. The shared audio sidecar stores ordinary learned weights as BF16 while retaining normalization and residual-vector-quantizer tensors in FP32.
Files
| File | Tensor inventory | SHA-256 |
|---|---|---|
moss-tts-1.5-q8_0.gguf | 253 Q8_0, 1 BF16, 145 FP32, 0 FP16 | 83a7885739fe92113208c2abbb45985da30ac1a40c31d4b1a2e722a8ec5256ef |
moss-tts-1.5-q8_0.extras.gguf | 618 BF16, 1,046 FP32, 0 FP16 | d50f71cffd44e4b76db58e5be09155200b74c6058c5ebeac58e026926c9a72eb |
moss-tts-1.5.gguf | 254 BF16, 145 FP32, 0 FP16 | f732033d4f1f528ec49ec93904a97c7c61de9ba76e3a0b63d199518dd1ea35f7 |
moss-tts-1.5.extras.gguf | 618 BF16, 1,046 FP32, 0 FP16 | d50f71cffd44e4b76db58e5be09155200b74c6058c5ebeac58e026926c9a72eb |
Download one backbone and its same-stem *.extras.gguf sidecar. The Q8_0 pair is recommended for normal use; the full BF16 pair is the reference conversion.
Source revisions
- TTS:
OpenMOSS-Team/MOSS-TTS-v1.5@cdd3b911b1585e3f2dbc7775ef10f9926f58850a - Audio tokenizer:
OpenMOSS-Team/MOSS-Audio-Tokenizer@3cd226ba2947efa357ef453bcad111b6eafba782 - Converter/runtime base:
pwilkin/openmoss@d1f2976a89fd51bf949d28320af401e523b78c67, plus BF16-preserving conversion and BF16/FP32 codec-sidecar loading
Runtime requirement
Use an OpenMOSS build with BF16/FP32 codec-sidecar loading support. Older builds that require moss.codec.quantizer.* tensors to be FP16 cannot decode these corrected sidecars. The upstream audio tokenizer keeps its residual-vector-quantizer math in FP32, so down-converting those tensors is not a valid compatibility fix.
Validation
- Tensor audit: zero FP16 tensors in all four files.
- Full BF16 pair: CPU model load, natural end-of-speech, and codec decode to a 2.16-second WAV.
- Q8_0 pair: CPU and Vulkan model/sidecar load, natural end-of-speech, and complete codec decode.
- The long Q8_0 pilot produced 15.52 seconds on CPU and 14.48 seconds on Vulkan. CPU Whisper recovered the complete three-sentence script, including the final sentence from 10.76 seconds onward and the final words
stirring once more. - Long-pilot waveform QA found zero clipped samples, no late crop transient, and 0.13 seconds of trailing silence.
OpenMOSS usage
Plain TTS:
moss-tts-cli \
--model moss-tts-1.5-q8_0.gguf \
--text "Moonlight falls across the old stone road." \
--output speech.wav
Voice cloning:
moss-tts-cli \
--model moss-tts-1.5-q8_0.gguf \
--reference reference.wav \
--text "The gate is open. We should move before dawn." \
--output cloned.wav
License
The source model and these converted weights are provided under Apache 2.0.