---
title: libwaifu-indextts-2.5
canonical_url: "https://www.modelscope.cn/models/ling0322/libwaifu-indextts-2.5"
md_url: "https://www.modelscope.cn/models/ling0322/libwaifu-indextts-2.5.md"
repository: ling0322/libwaifu-indextts-2.5
last_updated: 2026-09-23
license: other
pipeline_tag: text-to-speech
tasks:
  - text-to-speech
base_model:
  - IndexTeam/IndexTTS-2.5
  - facebook/w2v-bert-2.0
  - funasr/campplus
  - nvidia/bigvgan_v2_22khz_80band_256x
base_model_relation: finetune
parameters: 865.9M
tensor_type:
  - F32
library_name:
  - safetensors
language:
  - zh
  - en
  - ja
  - yue
downloads: 13
stars: 0
tags:
  - libwaifu
  - indextts
  - text-to-speech
  - voice-cloning
---

# libwaifu-indextts-2.5

> libwaifu-indextts-2.5 - ling0322 在 ModelScope 开源的模型。IndexTTS-2.5 — the libwaifu package

ling0322/libwaifu-indextts-2.5 是 ModelScope 魔搭社区上的 865.9M 参数text-to-speech模型，采用 other 许可，基于 IndexTeam/IndexTTS-2.5、facebook/w2v-bert-2.0、funasr/campplus 构建。

- **Repository**: ling0322/libwaifu-indextts-2.5
- **License**: other
- **Tasks**: text-to-speech
- **Parameters**: 865.9M
- **Base model**: IndexTeam/IndexTTS-2.5, facebook/w2v-bert-2.0, funasr/campplus, nvidia/bigvgan_v2_22khz_80band_256x
- **Tags**: libwaifu, indextts, text-to-speech, voice-cloning
- **Downloads**: 13
- **Stars**: 0
- **Last updated**: 2026-09-23

Source: https://www.modelscope.cn/models/ling0322/libwaifu-indextts-2.5

---

# IndexTTS-2.5 — the libwaifu package

**IndexTTS-2.5**, converted to the package format [libwaifu](https://github.com/ling0322/libwaifu)
reads. A few seconds of somebody speaking and a sentence in; the sentence, in that voice, out. The
same six models drawing the same audio; a different file layout and one table instead of six.

> **By downloading these files you agree to the [bilibili Model Use License
> Agreement](https://huggingface.co/IndexTeam/IndexTTS-2.5/blob/main/LICENSE)**, a copy of which
> is distributed here as `LICENSE`. Commercial use beyond 100 million monthly active users or
> RMB 1 billion in annual revenue (§2.2) needs a separate license from bilibili; deployment in
> medical, autonomous-driving, military, critical-infrastructure, biometric-surveillance or
> automated-decision-making settings is prohibited outright (§4.2).
>
> **This is a modified copy** — see `NOTICE` for what was changed — and it is **not an official
> bilibili or IndexTeam product and is not endorsed by either**. The original weights are at
> [IndexTeam/IndexTTS-2.5](https://huggingface.co/IndexTeam/IndexTTS-2.5). Any modifications made
> here are not endorsed, warranted, or guaranteed by bilibili, who disclaims all liability related
> to this derivative work.
>
> Three further components are bundled in under their own, permissive licenses — see
> **Attribution** below.

## What is here

| package | on disk | what it is |
|---|---|---|
| `indextts25.yaml` and its parts | 5.1 GB | float32 throughout |

One manifest carries the whole pipeline: the GPT, the emotion path, w2v-bert's front end,
CAMPPlus, the semantic codec's decoder, S2Mel and the BigVGAN vocoder, plus the tokenizer. Nothing
else has to be fetched to speak.

## Speaking with it

```bash
waifu draw -voice indextts25.yaml          # the page's text2speech tab
cargo run --release --example speak -- indextts25.yaml voice.wav "Hello there." out.wav
```

```rust
let tts = IndexTts::from_manifest(Device::Cuda, Residency::Device, &manifest)?;
let voice = tts.listen(&recording)?;               // once per voice
let sound = tts.say("今天天气很好。", &voice, &options, &mut report)?;
```

Fifteen seconds of the target voice is what it reads; the sentence comes out in that voice,
English, Chinese, Japanese and Cantonese all understood. `docs/indextts.md` in the libwaifu
repository has the full pipeline — what each of the seven models does and in what order.

## Where this package knowingly differs from upstream

- **No beam search.** Upstream samples inside a three-way beam search; this draws one sequence
  with the same temperature, top-k, top-p and repetition penalty.
- **The language is guessed from the script**, not asked for: Kana reads as Japanese, other CJK
  script as Chinese, everything else as English.
- **The emotion cannot be set independently.** Upstream can also take eight named emotions or read
  one out of an instruction with a small Qwen model; neither is here, so the voice sounds the way
  its reference recording felt.

Nothing is narrowed for size: upstream runs S2Mel and the vocoder with autocast off, in float32,
and that is exactly where half a precision's worth of error would become audible in a vocoder —
so the package stays about the size of the release.

## Verifying it

Checked against upstream's own CAMPPlus, over three LibriSpeech speakers: sentences said in a
given voice come back 0.85–0.89 similar to that speaker's own recording by cosine similarity, and
0.32–0.63 similar to an unrelated one. `docs/indextts.md` has the fuller account, including a
by-hand transcription check against Whisper.

## Attribution

IndexTTS-2.5 is licensed under the bilibili Model Use License Agreement — see
https://huggingface.co/IndexTeam/IndexTTS-2.5/blob/main/LICENSE.

This package also bundles, converted the same way:

- **w2v-bert-2.0** from [facebook/w2v-bert-2.0](https://huggingface.co/facebook/w2v-bert-2.0)
  (MIT)
- **CAMPPlus** from [funasr/campplus](https://huggingface.co/funasr/campplus) (Apache License 2.0)
- **BigVGAN** from
  [nvidia/bigvgan_v2_22khz_80band_256x](https://huggingface.co/nvidia/bigvgan_v2_22khz_80band_256x)
  (MIT)

See `NOTICE` for exactly what was changed in each.