MOSS-TTS

MOSS-TTS in audio.cpp includes the larger Local Transformer model and the smaller Nano model. Both use a MOSS audio tokenizer under the model root and support text-only speech plus optional zero-shot voice cloning through the framework speaker-reference interface.

MOSS-TTS-Local

MOSS-TTS-Local is the larger local-transformer path.

Field	Value
Family	moss_tts_local
Model directory	models/MOSS-TTS-Local-Transformer-v1.5
Required codec layout	audio_tokenizer/ directory inside the model root
Task	tts, clon
Modes	offline
Languages	Model auto-handles supported languages; --language can pass a language hint
Voice input	Optional reference WAV through --voice-ref; transcript through --reference-text when known
Built-in voices	Not exposed

Text-only speech:

audiocpp_cli --task tts --family moss_tts_local --model /path/to/MOSS-TTS-Local-Transformer-v1.5 --backend cuda --text "Hello from MOSS-TTS-Local." --out out.wav

Voice clone:

audiocpp_cli --task clon --family moss_tts_local --model /path/to/MOSS-TTS-Local-Transformer-v1.5 --backend cuda --text "Hello from MOSS-TTS-Local." --voice-ref /path/to/reference.wav --reference-text "Reference transcript when available." --out out.wav

Option	Values	Default	Meaning
--voice-ref	WAV path	not set	Reference speaker audio for cloning.
--reference-text	text	empty string	Transcript for reference audio.
--language	language hint	auto	Optional language hint for the prompt template.
--max-tokens	integer	4096	Maximum generated audio frames.
--do-sample	true, false	true	Enable stochastic audio-token sampling.
--temperature	float	1.7	Audio-token sampling temperature.
--top-p	float	0.8	Audio-token nucleus sampling limit.
--top-k	integer	25	Audio-token top-k sampling limit.
--repetition-penalty	float	1.0	Audio-token repetition penalty.
--request-option text_temperature=<float>	float	1.0	Text-gate sampling temperature.
--request-option text_top_p=<float>	float	1.0	Text-gate nucleus sampling limit.
--request-option text_top_k=<n>	integer	50	Text-gate top-k sampling limit.
--text-chunk-size	characters	2048	Framework long-form text chunk size.
--text-chunk-mode	default, tag_aware, japanese, endline	default	Framework long-form text chunking mode.
--session-option moss_tts_local.weight_type=auto|native|f32|f16|bf16|q8_0	enum	auto	Backbone weight storage type.
--session-option moss_tts_local.reference_cache_slots=<n>	integer slots	1	Prepared reference-voice cache slots; set 0 to disable reuse.

MOSS-TTS-Nano

MOSS-TTS-Nano is the smaller MOSS TTS path. It supports text-only continuation generation and voice cloning through the framework speaker-reference interface.

Field	Value
Family	moss_tts_nano
Model directory	models/MOSS-TTS-Nano-100M
Required codec layout	audio_tokenizer/ directory inside the model root
Task	tts, clon
Modes	offline
Languages	Model auto-handles supported languages
Voice input	Optional reference WAV through --voice-ref
Built-in voices	Not exposed

Text-only continuation:

audiocpp_cli --task tts --family moss_tts_nano --model /path/to/MOSS-TTS-Nano-100M --backend cuda --text "Hello from MOSS-TTS-Nano." --out out.wav

Voice clone:

audiocpp_cli --task clon --family moss_tts_nano --model /path/to/MOSS-TTS-Nano-100M --backend cuda --text "Hello from MOSS-TTS-Nano." --voice-ref /path/to/reference.wav --reference-text "Reference transcript when available." --out out.wav

Option	Values	Default	Meaning
--voice-ref	WAV path	not set	Reference speaker audio for cloning. When omitted, Nano uses text-only continuation mode.
--reference-text	text	empty string	Transcript for reference audio; valid only with --voice-ref.
--max-tokens	integer	300	Maximum generated audio frames per chunk.
--do-sample	true, false	true	Enable stochastic audio-token sampling.
--temperature	float	1.7	Audio-token sampling temperature.
--top-p	float	0.8	Audio-token nucleus sampling limit.
--top-k	integer	25	Audio-token top-k sampling limit.
--repetition-penalty	float	1.0	Audio-token repetition penalty.
--request-option text_temperature=<float>	float	1.5	Text-gate sampling temperature.
--request-option text_top_p=<float>	float	1.0	Text-gate nucleus sampling limit.
--request-option text_top_k=<n>	integer	50	Text-gate top-k sampling limit.
--text-chunk-size	characters	256	Framework long-form text chunk size.
--text-chunk-mode	default, tag_aware, japanese, endline	default	Framework long-form text chunking mode.
--session-option moss_tts_nano.weight_type=native|f32|f16|bf16|q8_0	enum	native	Global and local-frame weight storage type.
--session-option moss_tts_nano.global_weight_type=native|f32|f16|bf16|q8_0	enum	native	Global transformer weight storage type.
--session-option moss_tts_nano.local_frame_weight_type=native|f32|f16|bf16|q8_0	enum	native	Local frame decoder weight storage type.
--session-option moss_tts_nano.global_prefill_graph_arena_mb=<n>	MB	256	Global prefill graph arena size.
--session-option moss_tts_nano.global_decode_graph_arena_mb=<n>	MB	128	Global decode graph arena size.
--session-option moss_tts_nano.global_weight_context_mb=<n>	MB	512	Global transformer weight context size.
--session-option moss_tts_nano.local_frame_graph_arena_mb=<n>	MB	64	Local frame decoder graph arena size.
--session-option moss_tts_nano.local_frame_weight_context_mb=<n>	MB	128	Local frame decoder weight context size.
--session-option moss_tts_nano.audio_tokenizer_encoder_graph_arena_mb=<n>	MB	64	Audio tokenizer encoder graph arena size.
--session-option moss_tts_nano.audio_tokenizer_decoder_graph_arena_mb=<n>	MB	64	Audio tokenizer decoder graph arena size.
--session-option moss_tts_nano.audio_tokenizer_weight_context_mb=<n>	MB	128	Audio tokenizer weight context size.