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Open Source Notice

OFFTYPE is built on the work of many open-source projects. We're grateful for all of them.

OFFTYPE includes the open-source software components listed below. Each component is used under its own license. Names, copyright notices, and links to the upstream projects are reproduced in full as required.

Download NOTICE.txt

Core dependencies

sherpa-onnx v1.13.0

Apache 2.0

Copyright k2-fsa

github.com/k2-fsa/sherpa-onnx

onnxruntime v1.25.1

MIT

Copyright Microsoft Corporation

github.com/microsoft/onnxruntime

silero-vad v6.2.1

MIT

Copyright Silero

github.com/snakers4/silero-vad

PyAudio v0.2.14

MIT

people.csail.mit.edu/hubert/pyaudio

websockets v16.0

BSD-3-Clause

Copyright Aymeric Augustin

github.com/python-websockets/websockets

PyYAML v6.0.2

MIT

github.com/yaml/pyyaml

requests v2.33.1

Apache 2.0

Copyright Kenneth Reitz

github.com/psf/requests

numpy v2.3.5

BSD-3-Clause

Copyright NumPy Developers

github.com/numpy/numpy

torch v2.11.0

BSD-3-Clause

Copyright PyTorch Contributors

github.com/pytorch/pytorch

System.Drawing.Common v8.0.0

MIT

Copyright Microsoft Corporation

github.com/dotnet/runtime

AI models

SenseVoice-Small (ONNX int8)

Apache 2.0

Copyright FunAudioLLM / Alibaba

github.com/FunAudioLLM/SenseVoice

Qwen3-ASR 0.6B (int8 ONNX)

Apache 2.0

Copyright Alibaba Cloud · ONNX conversion: zengshuishui

huggingface.co/Qwen/Qwen3-ASR-0.6B

Qwen2.5-1.5B-Instruct (GGUF Q4_K_M)

Apache 2.0

Copyright Alibaba Cloud

huggingface.co/Qwen/Qwen2.5-1.5B-Instruct

silero-vad model

MIT

github.com/snakers4/silero-vad

Bundled inference engine

llama.cpp rpc 1c6dca, Vulkan build

MIT

Copyright llama.cpp contributors

Binaries: llama-cli.exe, llama.dll, ggml.dll, ggml-base.dll, ggml-cpu-*.dll, ggml-vulkan.dll, llama-common.dll, mtmd.dll

github.com/ggerganov/llama.cpp

LLVM OpenMP (libomp140.x86_64.dll)

MIT (with LLVM exceptions)

Copyright LLVM Project

github.com/llvm/llvm-project

.NET runtime

.NET 8.0 (self-contained publish)

MIT

Copyright Microsoft Corporation / .NET Foundation

github.com/dotnet/runtime

Transitive Python dependencies

Bundled by PyInstaller into the speech-server distribution.

attrs v26.1.0MITgithub.com/python-attrs/attrs
certifiMPL 2.0github.com/certifi/python-certifi
cffiMITgithub.com/python-cffi/cffi
chardetLGPL 2.1github.com/chardet/chardet
charset_normalizerMITgithub.com/Ousret/charset_normalizer
cryptographyApache 2.0 / BSD-3github.com/pyca/cryptography
CythonApache 2.0github.com/cython/cython
idnaBSD-3-Clausegithub.com/kjd/idna
lxmlBSD-3-Clausegithub.com/lxml/lxml
markupsafeBSD-3-Clausegithub.com/pallets/markupsafe
setuptoolsMITgithub.com/pypa/setuptools
tqdmMITgithub.com/tqdm/tqdm
urllib3MITgithub.com/urllib3/urllib3
werkzeugBSD-3-Clausegithub.com/pallets/werkzeug