tongflow-modal-indextts2
August 14, 2026 · View on GitHub
Official TongFlow plugin. Emotionally expressive text-to-speech with IndexTTS-2.5 (IndexTeam/IndexTTS-2.5, Bilibili), running on a GPU via Modal.
Capabilities
- Speech synthesis — voice clone (
text-gen-speech-clone) — zero-shot voice cloning from a reference audio clip (Chinese, English, Japanese, Spanish, Arabic). - Emotive speech (
text-audio-gen-speech) — synthesize text in the voice of a reference audio with an emotion instruction (happy, sad, angry, …), driven by IndexTTS-2.5's emotion-text guidance.
Credentials
Add in TongFlow Settings (gear icon, top-right):
| Key | Required | Notes |
|---|---|---|
MODAL_TOKEN_ID | ✅ | Create at modal.com/settings/tokens. |
MODAL_TOKEN_SECRET | ✅ | Paired with MODAL_TOKEN_ID. |
On first use the plugin deploys to your Modal account automatically and caches the build. The IndexTTS-2.5 weights and auxiliary models (w2v-bert-2.0, MaskGCT semantic codec, CAMPPlus, BigVGAN) are public — no Hugging Face token required.
License note
IndexTTS-2.5 weights are distributed under the bilibili IndexTTS Model License; review it before commercial use.