# Copyrights and Licenses

[中文]

## Software Copyrights

All original source code in this repository is Copyright (C) 2015-2026 Espressif Systems. This source code is licensed under the ESPRESSIF MIT License as described in the file LICENSE.

Additional third party copyrighted code is included under the following licenses:

- mp3 library is Copyright (c) 2005-2008, The Android Open Source Project, and is licensed under the Apache License Version 2.0.

- aac library is Copyright (c) 2005-2008, The Android Open Source Project, and is licensed under the Apache License Version 2.0.

- amr library is Copyright (C) 2009 Martin Storsjo and is licensed under the Apache License Version 2.0.

- opus library, Copyright 2001-2011 Xiph.Org, Skype Limited, Octasic,Jean-Marc Valin, Timothy B. Terriberry, CSIRO, Gregory Maxwell, Mark Borgerding, Erik de Castro Lopo, is licensed under 3-clause BSD license.

- flac library, Copyright (C) 2011-2016 Xiph.Org Foundation, is licensed under Xiph.Org’s BSD-like license.

- vorbis library, Copyright (c) 2002-2020 Xiph.org Foundation, is licensed under the 3-Clause BSD license.

- aac-enc library is Copyright 2003-2010, VisualOn, and is licensed under the Apache License Version 2.0.

- adpcm library is Copyright (C) 2020 aikiriao <samuraiaiki@gmail.com>.

- jpeg-dec library is Copyright (C) 2019, ChaN.

- alac library is Copyright (C) 2004, developed by Apple, and is licensed under the Apache License Version 2.0.

Please refer to the COPYRIGHT in ESP-IDF Programming Guide

Where source code headers specify Copyright & License information, this information takes precedence over the summaries made here.

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