BoldVoice Accent Filter is built on the work of the open source community. This page lists the models and software it uses, with their licences and copyright holders.
These models are licensed under CC BY 4.0, which requires named attribution and a statement of whether the work was changed:
| Model | Role | Licence | Copyright |
|---|---|---|---|
| Seed-VC | Voice conversion — the CFM decoder that renders output audio Strong copyleft. Obligations attach on distribution, not on serving output from our own servers, so this is used server-side only. | GPL-3.0 | Plachtaa and the seed-vc authors |
| Kokoro-82M | Coach text-to-speech | Apache-2.0 | hexgrad |
| Qwen3-ASR-1.7B | Speech recognition — learner transcript | Apache-2.0 | Alibaba Cloud — Qwen team |
| Qwen3-ForcedAligner-0.6B | Word-level forced alignment | Apache-2.0 | Alibaba Cloud — Qwen team |
| Whisper | Content features, speech gate and fallback transcription Code is MIT; the published weights are Apache-2.0. | MIT | Copyright (c) 2022 OpenAI |
| BigVGAN v2 | Neural vocoder | MIT | Copyright (c) 2024 NVIDIA CORPORATION |
| CAM++ (CAMPPlus) | Speaker embedding for timbre matching | Apache-2.0 | Alibaba DAMO Academy — FunASR |
| ClearerVoice-Studio (MossFormer2) | Speaker separation (SS_16K) and speech enhancement (SE_48K) | Apache-2.0 | Alibaba Group — ModelScope |
| Silero VAD | Voice activity detection | MIT | Copyright (c) 2020-present Silero Team |
| Resemble Enhance | Speech enhancement | MIT | Copyright (c) 2023 Resemble AI |
| Streaming Sortformer (4-speaker v2) | Speaker diarization CC-BY requires named attribution and a statement of modification. | CC-BY-4.0 | NVIDIA Corporation |
| pyannote speaker-diarization-community-1 | Speaker diarization CC-BY requires named attribution and a statement of modification. | CC-BY-4.0 | pyannote community; pyannote.audio © 2020 CNRS |
| Fun-CosyVoice3-0.5B | Speech synthesis for single-word correction | Apache-2.0 | Alibaba Group — FunAudioLLM |
| CrisperWhisper not in production | Verbatim transcription — internal evaluation only Weights AND outputs are non-commercial. Excluded from production by the VERBATIM_ENABLED gate; never reaches a commercial surface. | Non-commercial (nyra health research licence) | nyra health GmbH |
Seed-VC is licensed under the GNU General Public License v3.0. It runs on our servers and is not distributed as part of any client application. Its source is available from the project upstream under the terms of the GPL v3.
| Package | Licence | Copyright |
|---|---|---|
| boto3 | Apache-2.0 | Amazon Web Services |
| clearvoice | Apache-2.0 | Alibaba Group — ModelScope |
| crisperwhisper | MIT | nyra health GmbH |
| cuda-python | NVIDIA Proprietary | NVIDIA Corporation |
| descript-audio-codec | MIT | Descript, Inc. |
| einops | MIT | Alex Rogozhnikov |
| fastapi | MIT | Copyright (c) 2018 Sebastian Ramirez |
| faster-whisper | MIT | Guillaume Klein |
| httpx | BSD-3-Clause | Tom Christie |
| huggingface-hub | Apache-2.0 | Hugging Face, Inc. |
| ijson | BSD-3-Clause AND ISC | Rodrigo Tobar, Ivan Sagalaev |
| jiwer | Apache-2.0 | Nik Vaessen |
| kaldifst | Apache-2.0 | Xiaomi Corporation |
| kokoro | Apache-2.0 | hexgrad |
| librosa | ISC | Brian McFee, librosa development team |
| logtail-python | ISC | Better Stack |
| munch | MIT | Rotem Yaari |
| nemo_toolkit | Apache-2.0 | NVIDIA Corporation |
| nltk | Apache-2.0 | NLTK Team |
| num2words | LGPL-2.1 | Savoir-faire Linux |
| numpy | BSD-3-Clause AND 0BSD AND MIT AND Zlib AND CC0-1.0 | Travis E. Oliphant et al. |
| nvidia-cublas-cu12 | NVIDIA Proprietary | NVIDIA Corporation |
| nvidia-cudnn-cu12 | NVIDIA Proprietary | NVIDIA Corporation |
| onnxruntime | MIT | Microsoft Corporation |
| openai-whisper | MIT | OpenAI |
| pyannote.audio | MIT | Copyright (c) 2020 CNRS |
| pyjwt | MIT | Jose Padilla |
| python-multipart | Apache-2.0 | Andrew Dunham |
| pyyaml | MIT | Kirill Simonov |
| qwen-asr | Apache-2.0 | Alibaba Qwen Team |
| requests | Apache-2.0 | Kenneth Reitz |
| resemble-enhance | MIT | Copyright (c) 2023 Resemble AI |
| scipy | BSD-3-Clause | SciPy Developers |
| silero-vad | MIT | Silero Team |
| soundfile | BSD-3-Clause | Bastian Bechtold |
| spacy | MIT | Explosion |
| torch | Apache-2.0 AND Apache-2.0 WITH LLVM-exception AND BSD-2-Clause AND BSD-3-Clause AND BSL-1.0 AND MIT | PyTorch Team |
| torchaudio | BSD-2-Clause | Facebook Inc. (Soumith Chintala) |
| transformers | Apache-2.0 | The Hugging Face team (past and future) with the help of all our contributors (https://github.com/huggingface/transformers/graphs/contributors) |
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