Open source notices

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.

Creative Commons attribution

These models are licensed under CC BY 4.0, which requires named attribution and a statement of whether the work was changed:

Models

ModelRoleLicenceCopyright
Seed-VCVoice 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-3.0Plachtaa and the seed-vc authors
Kokoro-82MCoach text-to-speechApache-2.0hexgrad
Qwen3-ASR-1.7BSpeech recognition — learner transcriptApache-2.0Alibaba Cloud — Qwen team
Qwen3-ForcedAligner-0.6BWord-level forced alignmentApache-2.0Alibaba Cloud — Qwen team
WhisperContent features, speech gate and fallback transcription
Code is MIT; the published weights are Apache-2.0.
MITCopyright (c) 2022 OpenAI
BigVGAN v2Neural vocoderMITCopyright (c) 2024 NVIDIA CORPORATION
CAM++ (CAMPPlus)Speaker embedding for timbre matchingApache-2.0Alibaba DAMO Academy — FunASR
ClearerVoice-Studio (MossFormer2)Speaker separation (SS_16K) and speech enhancement (SE_48K)Apache-2.0Alibaba Group — ModelScope
Silero VADVoice activity detectionMITCopyright (c) 2020-present Silero Team
Resemble EnhanceSpeech enhancementMITCopyright (c) 2023 Resemble AI
Streaming Sortformer (4-speaker v2)Speaker diarization
CC-BY requires named attribution and a statement of modification.
CC-BY-4.0NVIDIA Corporation
pyannote speaker-diarization-community-1Speaker diarization
CC-BY requires named attribution and a statement of modification.
CC-BY-4.0pyannote community; pyannote.audio © 2020 CNRS
Fun-CosyVoice3-0.5BSpeech synthesis for single-word correctionApache-2.0Alibaba 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.

Software libraries

PackageLicenceCopyright
boto3Apache-2.0Amazon Web Services
clearvoiceApache-2.0Alibaba Group — ModelScope
crisperwhisperMITnyra health GmbH
cuda-pythonNVIDIA ProprietaryNVIDIA Corporation
descript-audio-codecMITDescript, Inc.
einopsMITAlex Rogozhnikov
fastapiMITCopyright (c) 2018 Sebastian Ramirez
faster-whisperMITGuillaume Klein
httpxBSD-3-ClauseTom Christie
huggingface-hubApache-2.0Hugging Face, Inc.
ijsonBSD-3-Clause AND ISCRodrigo Tobar, Ivan Sagalaev
jiwerApache-2.0Nik Vaessen
kaldifstApache-2.0Xiaomi Corporation
kokoroApache-2.0hexgrad
librosaISCBrian McFee, librosa development team
logtail-pythonISCBetter Stack
munchMITRotem Yaari
nemo_toolkitApache-2.0NVIDIA Corporation
nltkApache-2.0NLTK Team
num2wordsLGPL-2.1Savoir-faire Linux
numpyBSD-3-Clause AND 0BSD AND MIT AND Zlib AND CC0-1.0Travis E. Oliphant et al.
nvidia-cublas-cu12NVIDIA ProprietaryNVIDIA Corporation
nvidia-cudnn-cu12NVIDIA ProprietaryNVIDIA Corporation
onnxruntimeMITMicrosoft Corporation
openai-whisperMITOpenAI
pyannote.audioMITCopyright (c) 2020 CNRS
pyjwtMITJose Padilla
python-multipartApache-2.0Andrew Dunham
pyyamlMITKirill Simonov
qwen-asrApache-2.0Alibaba Qwen Team
requestsApache-2.0Kenneth Reitz
resemble-enhanceMITCopyright (c) 2023 Resemble AI
scipyBSD-3-ClauseSciPy Developers
silero-vadMITSilero Team
soundfileBSD-3-ClauseBastian Bechtold
spacyMITExplosion
torchApache-2.0 AND Apache-2.0 WITH LLVM-exception AND BSD-2-Clause AND BSD-3-Clause AND BSL-1.0 AND MITPyTorch Team
torchaudioBSD-2-ClauseFacebook Inc. (Soumith Chintala)
transformersApache-2.0The Hugging Face team (past and future) with the help of all our contributors (https://github.com/huggingface/transformers/graphs/contributors)

Licence texts

MIT — full text
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
ISC — full text
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
BSD-3-Clause — full text
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Apache-2.0, GPL-3.0 and CC-BY-4.0 are linked from the tables above rather than reproduced here.

Lists the models and directly declared dependencies of this application. Packages listed with a compound expression (for example BSD-3-Clause AND MIT) bundle components under more than one licence; the full expression is shown as published rather than reduced to a single name. Transitive dependencies are governed by their own licences.

Questions about attribution: hello@boldvoice.com · Back to the app