- We can't use the original "Show experimental features" checkbox implementation, because it *deeply* breaks Gradio.
- Gradio's `gr.Examples()` API binds itself to the original state of the user interface. Gradio crashes and causes various bugs if we try to change the available UI controls later.
- Instead, we must use `gr.Dataset()` which acts like a custom input/output control and doesn't directly bind itself to the target control. We must also provide a secret, hidden "all mode choices" component so that it knows the names of all "control modes" that are possible in examples.
- We now also have a very visible warning label in the user interface, to clearly mark the experimental features.
- Bugs fixed:
* The code was unable to toggle the visibility of Experimental demos in the Examples list. It was not possible with Examples (since it's a wrapper around Dataset, but Examples contains its own internal state/copy of all data). Instead, we use a Dataset and manipulate its list directly.
* Gradio crashes with a `gradio.exceptions.Error` exception if you try to load an example that tries to use an experimental feature if we have removed its UI element. This is because Examples binds to the original user interface and *remembers* the list of choices, and it *cannot* dynamically select something that did not exist when the `gr.Examples()` was initially created. This problem is fixed by switching to `gr.Dataset()`.
* Furthermore, Gradio's `gr.Examples()` handler actually remembers and caches the list of UI options. So every time we load an example, it rewrites the "Emotion Control Mode" selection menu to only show the options that were available when the Examples table was created. This means that even if we keep the "Show experimental features" checkbox, Gradio itself will erase the experimental mode from the Control Mode selection menu every time the user loads an example. There are no callbacks or "update" functions to allow us to override this automatic Gradio behavior. But by switching to `gr.Dataset()`, we completely avoid this deep binding.
* The "Show experimental features" checkbox is no longer tied to a column in the examples-table, to avoid fighting between Gradio's example table trying to set the mode, and the experimental checkbox being toggled and also trying to set the mode.
* Lastly, the "Show experimental features" checkbox now remembers and restores the user's current mode selection when toggling the checkbox, instead of constantly resetting to the default mode ("same as voice reference"), to make the UI more convenient for users.
* fix: Configure "uv" build system to use CUDA on supported platforms
- Linux builds of PyTorch always have CUDA acceleration built-in, but Windows only has it if we request a CUDA build.
- The built-in CUDA on Linux uses old libraries and can be slow.
- We now request PyTorch built for the most modern CUDA Toolkit on Linux + Windows, to solve both problems.
- Mac uses PyTorch without CUDA support, since it doesn't exist on that platform.
- Other dependencies have received new releases and are included in this fix too:
* click was downgraded because the author revoked 8.2.2 due to a bug.
* wetext received a new release now.
* fix: Use PyPI as the hashing reference in "uv" lockfile
- PyPI is the most trustworthy source for package hashes. We need to remove the custom mirror from the config, otherwise that mirror always becomes the default lockfile/package source, which leads to user trust issues and package impersonation risks.
- Regional mirrors should be added by users during installation instead, via the `uv sync --default-index` flag. Documented with example for Chinese mirror.
- When users add `--default-index`, "uv" will try to discover the exact same packages via the mirror to improve download speeds, but automatically uses PyPI if the mirror didn't have the files or if the mirror's file hashes were incorrect. Thus ensuring that users always have the correct package files.
* docs: Improve README for IndexTTS2 release!
- "Abstract" separated into paragraphs for easier readability.
- Clearer document structure and many grammatical improvements.
- More emojis, to make it easier to find sections when scrolling through the page!
- Added missing instructions:
* Needing `git-lfs` to clone the code.
* Needing CUDA Toolkit to install the dependencies.
* How to install the `hf` or `modelscope` CLI tools to download the models.
- Made our web demo the first section within "quickstart", to give users a quick, fun demo to start experimenting with.
- Fixed a bug in the "PYTHONPATH" recommendation. It must be enclosed in quotes `""`, otherwise the new path would break on systems that had spaces in their original path.
- Improved all Python code-example descriptions to make them much easier to understand.
- Clearly marked the IndexTTS1 legacy section as "legacy" to avoid confusion.
- Removed outdated Windows "conda/pip" instruction which is no longer relevant since we use "uv" now.
* refactor(webui): Remove unused imports
The old IndexTTS1 module and ModelScope were being loaded even though we don't need them. They also have a lot of dependencies, which slowed down loading and could even cause some conflicts.
* feat!: Remove obsolete build system (setup.py)
BREAKING CHANGE: The `setup.py` file has been removed.
Users should now use the new `pyproject.toml` based "uv" build system for installing and developing the project.
* feat: Add support for installing IndexTTS as a CLI tool
- We now support installing as a CLI tool via "uv".
- Uses the modern "hatchling" as the package / CLI build system.
- The `cli.py` code is currently outdated (doesn't support IndexTTS2). Marking as a TODO.
* chore: Add authors and classifiers metadata to pyproject.toml
* feat: Faster installs by making WebUI dependencies optional
* refactor!: Rename "sentences" to "segments" for clarity
- When we are splitting text into generation chunks, we are *not* creating "sentences". We are creating "segments". Because a *sentence* must always end with punctuation (".!?" etc). A *segment* can be a small fragment of a sentence, without any punctuation, so it's not accurate (and was very misleading) to use the word "sentences".
- All variables, function calls and strings have been carefully analyzed and renamed.
- This change will be part of user-facing code via a new feature, which is why the change was applied to the entire codebase.
- This change also helps future code contributors understand the code.
- All affected features are fully tested and work correctly after this refactoring.
- The `is_fp16` parameter has also been renamed to `use_fp16` since the previous name could confuse people ("is" implies an automatic check, "use" implies a user decision to enable/disable FP16).
- `cli.py`'s "--fp16" default value has been set to False, exactly like the web UI.
- `webui.py`'s "--is_fp16" flag has been changed to "--fp16" for easier usage and consistency with the CLI program, and the help-description has been improved.
* feat(webui): Set "max tokens per generation segment" via CLI flag
- The "Max tokens per generation segment" is a critical setting, as it directly impacts VRAM usage. Since the optimal value varies significantly based on a user's GPU, it is a frequent point of adjustment to prevent out-of-memory issues.
- This change allows the default value to be set via a CLI flag. Users can now conveniently start the web UI with the correct setting for their system, eliminating the need to manually reconfigure the value on every restart.
- The `webui.py -h` help text has also been enhanced to automatically display the default values for all CLI settings.
* refactor(i18n): Improve clarity of all web UI translation strings
* feat(webui): Use main text as emotion guidance when description is empty
If the user selects "text-to-emotion" control, but leaves the emotion description empty, we now automatically use the main text prompt instead.
This ensures that web users can enjoy every feature of IndexTTS2, including the ability to automatically guess the emotion from the main text prompt.
* feat: Add PyTorch GPU acceleration diagnostic tool
* chore: Use NVIDIA CUDA Toolkit v12.8
Downgrade from CUDA 12.9 to 12.8 to simplify user installation, since version 12.8 is very popular.
* docs: Simplify "uv run" command examples
The "uv run" command can take a `.py` file as direct argument and automatically understands that it should run via python.
