diodiogod-TTS-Audio-Suite/docs/FEATURE_COMPARISON.md

Feature Comparison Matrix

Feature Comparison Matrix

Feature	F5-TTS	ChatterBox	ChatterBox 23L	VibeVoice	Higgs Audio 2	Higgs Audio v3	IndexTTS-2	CosyVoice3	Qwen3-TTS	Granite ASR	Step Audio EditX	Echo-TTS	Fish Audio S2 Pro	Dots TTS	Audio8 TTS	DramaBox	OmniVoice	MOSS-TTS	MOSS-SoundEffect v2	RVC
TTS	✅	✅	✅	✅	✅	✅	✅	✅	✅	❌	✅	✅	✅	✅	✅	✅	✅	✅	❌	❌
SRT	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	❌	❌
Voice Conversion	❌	✅	✅	❌	❌	❌	❌	✅	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	✅
ASR (Transcribe)	❌	❌	❌	❌	❌	❌	❌	❌	✅	✅	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌
Sound Effects	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	✅	✅	❌
Training	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	✅	❌	✅
Voice Cloning	✅	✅	✅	✅	✅	✅	✅	✅	✅ (Base model)	❌	✅	✅	✅ Reference audio plus exact transcript	✅	✅ Zero-shot and cross-lingual; reference audio must be paired with its exact transcript	✅ Optional reference audio; configurable 3-30 second window from the beginning of the source, default 10 seconds	✅	✅	❌	⚠️ (needs training)
Reference Transcript†	Required	Not used	Not used	Not used	Optional	Optional	Not used	Conditional	Conditional	N/A	Required	Not used	Required	Optional	Conditional	Not used	Required	Conditional	Not used	N/A
Native Multi-Speaker	❌	❌	❌	✅ (Base only, Kugel uses fallback)	✅	❌	❌	❌	❌	⚠️ (Plus variant speaker attribution / diarization)	❌	❌	✅ Native dialogue is default; optional custom mode generates each [Character] segment independently as local speaker 0	❌	❌	❌	❌	✅ (TTSD v1.0; 1-5 speakers)	❌	❌
Emotion Control	❌	❌	⚠️ (v2 tags - doesn't work)	❌	⚠️ (via prompt)	✅ (native inline tags)	✅ (8 emotions)	⚠️ (via instruct)	⚠️ (via instruct)	❌	✅ (14 emotions)	❌	✅ Free-form inline natural-language tags	❌	❌	✅ Natural-language scene prompt and stage directions	⚠️ (voice-design instruct + inline non-verbal tags)	✅ (MOSS-VoiceGenerator instruction-conditioned voice design)	❌	❌
Native Long-form	❌	❌	❌	✅	❌	❌	❌	❌	❌	❌	❌	❌	✅ Configurable 4K-32K native context; suite text chunking is bypassed	❌	❌	✅ Official duration-aware quote-group chunking; ~37s target / 45s cap	✅ (uses upstream audio_chunk_duration / audio_chunk_threshold orchestration; bypasses suite char-based chunk splitting)	✅ (TTSD/Delay long-form; use chunk orchestration for very long inputs)	❌	N/A
Community Finetunes	✅	✅	✅	✅ KugelAudio, Hindi	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	❌	✅ (LoRA adapter inference supported; initial integrated LoRA training support added for MOSS-TTS Delay 8B)	❌	✅
VRAM Efficient	✅	✅	✅	⚠️ (5-18GB)	⚠️ (9GB)	⚠️ (~8-10GB)	⚠️ (9-12GB)	✅ (5.4GB)	✅ (3-6GB)	✅ (~4.6GB)	⚠️ (7GB)	⚠️ (~7GB total)	⚠️ 8K context measured at ~15.2GB BF16, ~11.2GB FP8, ~11.2GB BNB INT8, or ~8.9GB BNB NF4; BF16 codec and activations; BNB is a load-time option for the official checkpoint	⚠️ (main env works; 2B-class model is not lightweight)	⚠️ ~1.75 GiB model-plus-codec parameter memory at fp16/bf16 or ~3.5 GiB at float32/CPU, before KV cache, activations, and framework overhead; shared runtime reuses the main environment's PyTorch	✅ Fast mode is ~24GB; experimental FP8 peaks on RTX 4090: staged ~15.1GB allocated, sequential ~11.7GB allocated / ~12.4GB reserved	⚠️ (main env works; 2B-class model is not lightweight)	⚠️ (Local 1.7B smaller; tokenizer is large)	⚠️ (runs in the main ComfyUI environment but remains GPU-heavy)	✅
Speed/Performance	✅ Very Fast	✅ Fast	✅ Fast	⚠️	⚠️	⚠️ CUDA recommended	⚠️	✅ Fast	⚠️	⚠️ Moderate	⚠️	✅ Fast (diffusion, realtime-capable)	✅ Main-environment subprocess with reliable teardown; local compile measurements: ~40 it/s BF16, ~11.8 it/s NF4 at ~8.9GB VRAM, and ~3.7 it/s INT8 at ~11.2GB VRAM; quality comparison pending	⚠️ Moderate; mf variant is faster	⚠️ Live shared-runtime validation: 6.36s reference-free audio in 39.3s including load; 9.99s cloned audio in 36.7s warm; exact cache reuse in 56ms	⚠️ Fast favors repeated generation; staged reloads temporary components; sequential also transfers the transformer; optional block-level torch.compile accelerates repeat denoising	✅ Fast; upstream reports sub-realtime RTF	✅ Fast with CUDA/FlashAttention	⚠️ (100 diffusion steps by default)	✅ Fast
No Narrator Required	❌	✅ (default speaker)	✅ (default speaker)	✅ (zero-shot / default speaker)	✅ (basic TTS if no narrator/reference is provided)	✅ (zero-shot)	❌	✅ (cross-lingual or instruct mode)	✅ (Base default voice or CustomVoice presets)	N/A	❌	❌	✅ Reference audio is optional	✅ (default speaker)	✅ Reference audio is optional	✅ Voice reference is optional	✅ (native default voice; instruct also works without narrator)	✅ (direct TTS and prompt-only generation)	❌	N/A

† Reference Transcript: Conditional means the transcript is required only for the specific mode: CosyVoice3 zero-shot, Qwen3-TTS full Base cloning, or MOSS-TTSD cloned-speaker dialogue, and Audio8 TTS zero-shot/cross-lingual cloning. Higgs Audio 2, Higgs Audio v3, and Dots TTS accept matching text when provided but do not require it.