フリーウェアとして頒布されています。非商用・無保証の条件で利用・改変できます。 本 Web 版はこの頒布条件を継承します。

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X millennium をベースに機能追加・チューニングを施した版。 本 Web 版はこちらのソースを使用しています。原作の頒布条件（フリーウェア・非商用・無保証）を継承します。

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フロッピーディスクドライブのシミュレーション用 WAV データ。作者の許諾のもと使用しています。

YM2151 (OPM) / OPN / OPL 系 FM 音源のソフトウェアエミュレーション。

File: fm.c -- software implementation of FM sound generator
Copyright (C) 1998 Tatsuyuki Satoh, MultiArcadeMachineEmulator development
Version 0.37d

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.

Usage of the MAME sound core outside of MAME is prohibited.
The MAME sound core may only be used in a manner consistent with the
MAME license, i.e. for non-commercial purposes only.

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AY-3-8910 / YM2149 PSG 音源のエミュレーション。

ay8910.c -- Emulation of the AY-3-8910 / YM2149 sound chip.

Based on various code snippets by Ville Hallik, Michael Cuddy,
Tatsuyuki Satoh, Fabrice Frances, Nicola Salmoria.

For further information, see the MAME source code or contact the authors.
Non-commercial use only. See fm.c license above.

zlib/libpng license

Copyright (c) 2021 Andre Weissflog

This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the
use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:

    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not
       be misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.

C/C++ を WebAssembly にコンパイルするツールチェーン。生成された JavaScript ランタイムを含みます。

Emscripten is available under 2 licenses, the MIT license and the
University of Illinois/NCSA Open Source License.

Copyright (c) 2010-2014 Emscripten contributors.

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.