Blocky Music License

Blocky Music: licence notice

Blocky Music © 2026 QwU World · https://qwu.world · it.qwuworld@gmail.com Last updated: 1 November 2026

Together, the terms in this notice make up the Blocky Music License (on Modrinth: LicenseRef-Blocky-Music-License). It is not a separate licence text. QwU World's own code is under the MIT License (LICENSE), QwU World's own assets are under CC BY-NC 4.0 (LICENSE-ASSETS.md), and the exceptions are listed below. In the mod jar (META-INF/neoforge.mods.toml) this is written as the SPDX expression MIT AND CC-BY-NC-4.0. That expression is a one-line summary for the whole jar and cannot list exceptions, so the exceptions below still apply. The build copies this file, LICENSE and LICENSE-ASSETS.md into the jar's META-INF/ folder.

In the lists below, code paths are relative to src/main/java/ru/gora/musicbattle/ and asset paths are relative to src/main/resources/assets/music_battle/ (assets/music_battle/ inside the jar). Files described as being "in the repository root" are in the source repository only, not in the jar.

Licences at a glance

The LICENSE file is the standard MIT text. It applies only to the files in the MIT row above.

Names and logos

"QwU World", "Blocky Music" and their logos are not covered by either licence. The licences give no right to use them. Please do not use them for your own releases, or in any way that suggests QwU World made or endorsed your work, without asking us first. The Blocky Music logo is src/main/resources/blocky_music_logo.png (blocky_music_logo.png in the jar, the mod's icon in the mod list), commissioned from an artist.

Music and player content

• Blocky Music ships no music.
• Beatmaps, songs and other audio, cover images, and osu! and Friday Night Funkin' files that a player creates, imports or shares belong to their owners. This includes beatmaps and songs published to a world or server. QwU World does not license them and grants no rights to them.
• A player who imports or shares a beatmap or song is responsible for having the right to use and share it.

Other products named in the mod

Blocky Music can import beatmaps from Friday Night Funkin' JSON files and osu! .osu and .osz files. These names only identify the file formats. Blocky Music is not affiliated with or endorsed by The Funkin' Crew Inc. (Friday Night Funkin') or ppy Pty Ltd (osu!). "Friday Night Funkin'" is a trademark of The Funkin' Crew Inc. (source). ppy states that the "osu!" and "ppy" branding is protected by trademark law (source). The mod also names the Iris and Oculus shader mods, only to explain a compatibility limit.

Minecraft

> NOT AN OFFICIAL MINECRAFT PRODUCT. NOT APPROVED BY OR ASSOCIATED WITH MOJANG OR MICROSOFT

(Disclaimer wording from the Minecraft Usage Guidelines.)

QwU World, not Mojang or Microsoft, is responsible for Blocky Music. Contact: it.qwuworld@gmail.com.

Not included in Blocky Music

• playerAnimator by KosmX: a required client-side mod that players install separately (Modrinth). It has its own MIT licence, "Copyright (c) 2022 KosmX" (source). It is not bundled in the Blocky Music jar and is not covered by QwU World's licences.
• Minecraft and NeoForge are not included. Songs are played with the Ogg Vorbis decoder that ships with Minecraft. Converting a song to Ogg Vorbis, and making the 1.5x and 2x copies a battle plays, is done by the mod's own code in audio/ and audio/codec/; the parts of it that follow other people's work are credited below.
• No other programs. Blocky Music does not include, download or run FFmpeg or any other program to convert audio.

Credits: public domain

The files named below are under MIT (LICENSE); that licence covers QwU World's own code in them. Parts of them follow the sources listed here. Their authors state that these sources are public domain, and each author's own statement is quoted. QwU World does not claim those parts as its own work. They are credited here:

• Reverb in client/LiveDjAudioEffects.java uses the filter structure and tuning values of Freeverb by Jezar at Dreampoint (June 2000). The Freeverb source headers say "This code is public domain" (read from a mirror; see also CCRMA).
• Integer hash in client/ClientTrackEffects.java and client/ClientOsuManiaImporter.java: lowbias32 by Chris Wellons (source: "All information on this blog, unless otherwise noted, is hereby released into the public domain").
• Ogg Vorbis decoder in audio/codec/VorbisDecoder.java, VorbisDecoderSetup.java, VorbisDecoderBits.java, VorbisDecoderMdct.java and OggPageReader.java: a Java port of stb_vorbis 1.22 by Sean Barrett (source, commit 1ee679ca2ef753a528db5ba6801e1067b40481b8, the last one to change the file; it is unchanged at commit 003501f6d7a8668ce8b6d875e34dd97ad0d5d5b5). stb_vorbis offers two licences ("This software is available under 2 licenses -- choose whichever you prefer"); this port relies on the second, "ALTERNATIVE B - Public Domain (www.unlicense.org): This is free and unencumbered software released into the public domain." Where the port departs from stb_vorbis it follows the Vorbis I specification by the Xiph.Org Foundation, and the code says so at each place.
• MP3 decoder in audio/codec/Mp3Decoder.java: its frame decoder is a Java port of minimp3 by Lieff (source, commit ea99364f61c14656440e8d77e9c233ccf3124633). minimp3.h says: "To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty." (Creative Commons CC0 1.0.)

Third-party material

QwU World does not offer the material in this section under its licences.

NeoForge MDK template (MIT). build.gradle, settings.gradle, gradle.properties and src/main/resources/META-INF/neoforge.mods.toml are based on the NeoForge MDK template for Minecraft 1.21.1 (source). QwU World's MIT licence covers only QwU World's changes to these files. Of them, only META-INF/neoforge.mods.toml is in the jar. It has not been confirmed that this functional boilerplate is a "substantial portion" of the template, which is when MIT's notice condition applies; the template's notice is included here as a precaution, not as a statement that the law requires it. The template's licence (TEMPLATE_LICENSE.txt) reads:

MIT License

Copyright (c) 2023 NeoForged project

This license applies to the template files as supplied by github.com/NeoForged/MDK


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.

Gradle wrapper (Apache License 2.0). gradlew, gradlew.bat, gradle/wrapper/gradle-wrapper.jar and gradle/wrapper/gradle-wrapper.properties are the Gradle wrapper, generated by Gradle: "Copyright © 2015 the original authors", Apache License 2.0 (SPDX-License-Identifier: Apache-2.0 in gradlew), with the licence text in the jar's own META-INF/LICENSE. They are files of the source repository only, not of the mod jar. QwU World's MIT licence does not cover them. The Apache License 2.0 is reproduced in full below, under AAC and Apple Lossless decoding.

Nunito fonts (SIL Open Font License 1.1). font/nunito-semibold.ttf, font/nunito-bold.ttf and font/nunito-extrabold.ttf are built by tools/fonts/build-fonts.py from Nunito[wght].ttf in Google Fonts (github.com/google/fonts, ofl/nunito, SHA-256 pinned in the script). "Copyright 2014 The Nunito Project Authors (https://github.com/googlefonts/nunito)". They are Modified Versions under the OFL: the weights 600, 700 and 800 are instanced into static fonts, the character set is subset (Latin, Latin-1, Latin Extended-A, Cyrillic, punctuation), hinting and OpenType layout tables are removed, and simple outlines are added for ← ↑ → ↓ ★ ♥. Nunito has no Reserved Font Name. The fonts are distributed only inside the mod and its source repository, never sold by themselves, and remain under the OFL, whose full text is in font/license-ofl.txt next to them. That name is lowercase because Minecraft rejects a resource path containing an uppercase letter: while the file was called OFL.txt, every player's log carried Invalid path in pack: music_battle:font/OFL.txt, ignoring. Neither of QwU World's licences applies to them.

Lucide icons (ISC). The icon atlases textures/gui/workshop/icons_16.png, icons_32.png and icons_64.png are rasterised by tools/icons/build-icons.mjs from lucide-static 1.47.0 (npm, integrity pinned in the script): "Copyright (c) 2026 Lucide Icons and Contributors", ISC License. Lucide states that some of its icons derive from Feather, "Copyright (c) 2013-present Cole Bemis", MIT License; of the icons used here that applies to arrow-left, check, chevron-down, chevron-left, chevron-right, download, external-link, info, link, music, search, trash-2, triangle-alert (Feather's alert-triangle), upload and x. Both licence texts, as Lucide ships them, are in textures/gui/workshop/lucide-license.txt next to the atlases. The icons are recoloured to white and drawn tinted. Neither of QwU World's licences applies to them.

osu-framework (MIT). client/ui/Motion.java follows osu-framework 2026.914.0 by ppy Pty Ltd (source): the easing curves of DefaultEasingFunction and the scroll model and constants of ScrollContainer. QwU World's MIT licence covers only QwU World's own code in that file. osu-framework's licence (LICENCE) reads:

Copyright (c) 2024 ppy Pty Ltd <contact@ppy.sh>.

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.

libvorbis (BSD-3-Clause). The rest of the mod's audio code is QwU World's own, written from the Vorbis I specification, the FLAC specification (RFC 9639), ISO/IEC 14496-3 (MPEG-4 audio, for AAC), ISO/IEC 14496-12 (the ISO base media file format, for MP4), RFC 6716 and RFC 7845 (Opus), RFC 9559 (Matroska), ISO/IEC 13818-1 (MPEG transport streams, audio/codec/MpegTsDecoder.java), ISO/IEC 11172-3 (free-format MP3), the Opus project's specifications for Opus in ISO BMFF and in MPEG-2 transport streams, the IMA's "Recommended Practices for Enhancing Digital Audio Compatibility in Multimedia Systems" (1992, IMA ADPCM) and Microsoft's "Multimedia Standards Update" (1994, Microsoft ADPCM and RIFX; audio/codec/WavAdpcm.java, WavDecoder.java) and published methods, except for the code the entries after this one name (AAC, Apple Lossless, Opus) and two exceptions here. (The default Opus channel mappings for one to eight channels in MpegTsDecoder.java are that specification's table, the same numbers as libopus's vorbis_mappings in src/opus_multistream_encoder.c, which the libopus notice below covers.) First, the lowpass frequency for each encoding quality in audio/codec/VorbisEncoderLayout.java (lowpassForQuality) uses the twelve values of _psy_lowpass_44 in libvorbis's lib/modes/psych_44.h (commit 4ba8efed8797016a85e57bc3cc7975bb31d65db5 of libvorbis) by the Xiph.Org Foundation. Second, on Minecraft's timeline VorbisDecoder.queueMinecraft ends a song by libvorbis's own rule from vorbis_synthesis_blockin (lib/block.c): the granule position is counted from the first one a packet carries, by the distance between block centres, and at the end of the stream the samples counted past the page's granule position are cut. Minecraft decodes with JOrbis, a Java port of libvorbis that keeps this rule, and the mod has to follow it to stay in step with the game; its handful of lines follow the rule statement for statement. It has not been confirmed that twelve numbers, or a rule this short that the behaviour dictates, are protected at all; libvorbis's licence is reproduced here as a precaution, as its condition for redistribution in binary form asks, not as a statement that the law requires it. QwU World's MIT licence does not cover those values and those lines. The licence (COPYING in libvorbis 1.3.7) reads:

Copyright (c) 2002-2020 Xiph.org Foundation

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

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

- 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.

- Neither the name of the Xiph.org Foundation 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 FOUNDATION
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.

AAC and Apple Lossless decoding (Apache License 2.0). audio/codec/AlacDecoder.java is a Java port of Apple's reference Apple Lossless decoder: codec/ALACDecoder.cpp, ag_dec.c, dp_dec.c, matrix_dec.c, ALACBitUtilities.c and aglib.h of alac (commit c38887c5c5e64a4b31108733bd79ca9b2496d987), "Copyright (c) 2011 Apple Inc. All rights reserved." audio/codec/AacPs.java is a Java port of the floating-point parametric stereo decoder in Ittiam's libxaac (decoder/ixheaacd_ps_dec_flt.c of libxaac, commit 2fbadd57bca46693b7a077bcf1513131106d960c), and the constant tables in audio/codec/AacPsData.java and AacSbrData.java come from the same commit (decoder/ixheaacd_sbr_rom.c, encoder/ixheaace_sbr_rom.c, common/ixheaac_esbr_rom.c): "Copyright (C) 2018 The Android Open Source Project" and "Copyright (C) 2023 The Android Open Source Project", "Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore". The fine IID Huffman codes in AacSbrData.java and the scale factor band and TNS tables in audio/codec/AacTables.java come from PacketVideo's OpenCORE AAC decoder (ps_read_data.cpp, sfb.cpp, get_tns.cpp in the Android Open Source Project's platform/frameworks/base at tag android-4.0.4_r1, media/libstagefright/codecs/aacdec), "Copyright (C) 1998-2009 PacketVideo". The Huffman codebooks in audio/codec/AacHuffmanData.java come from VisualOn's AAC encoder (src/aac_rom.c at the same tag, media/libstagefright/codecs/aacenc), "Copyright 2003-2010, VisualOn, Inc.". The rest of the AAC, SBR and MP4 code is QwU World's own, written from ISO/IEC 14496-3 and ISO/IEC 14496-12. The ported files are changed from their sources: they are Java, every read is checked against the packet, and each file says where it departs from its source and why. QwU World's MIT licence does not cover those ports and tables. The licences give no right to patents other than the contributors' own (Apache License 2.0, section 3). libxaac's NOTICE file reads:

/******************************************************************************
 *                                                                            *
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *****************************************************************************
 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/

The Apache License 2.0, under which all four sources are offered, reads:

                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

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libopus (BSD-3-Clause). The Opus decoder in audio/codec/ is a Java port of the decoder in libopus 1.6.1, its floating-point build (source, tag v1.6.1, commit 22244de5a79bd1d6d623c32e72bf1954b56235be): OpusRangeDecoder.java follows celt/entdec.c, celt/entcode.c and celt/laplace.c, with the constants of celt/mfrngcod.h and celt/ecintrin.h; OpusCeltDecoder.java, OpusCeltBands.java, OpusCeltAllocation.java, OpusCeltMdct.java and OpusCeltTables.java follow celt/celt_decoder.c, celt.c, bands.c, vq.c, cwrs.c, rate.c, quant_bands.c, mdct.c, kiss_fft.c, pitch.c, celt_lpc.c, mathops.c, modes.c and static_modes_float.h; OpusSilkDecoder.java, OpusSilkChannel.java, OpusSilkResampler.java and OpusSilkTables.java follow the SILK decoder in silk/ (dec_API.c, decode_frame.c, decode_indices.c, decode_pulses.c, decode_parameters.c, decode_pitch.c, decode_core.c, PLC.c, CNG.c, NLSF_decode.c, NLSF2A.c, stereo_decode_pred.c, stereo_MS_to_LR.c, resampler*.c and the tables_*.c files, among others); OpusPacketDecoder.java follows src/opus_decoder.c and src/opus.c, with the constants of include/opus_defines.h and src/opus_private.h; OpusMultistreamDecoder.java follows src/opus_multistream_decoder.c and src/opus_multistream.c. The constant tables are copied value for value. The ported files are changed from their sources: they are Java, every read is checked against the packet, and the machine-learning extensions (DRED, deep PLC, OSCE) and the QEXT extension are left out. The Ogg Opus and WebM readers (OpusDecoder.java, WebmDecoder.java, OpusPcmStream.java, OpusHead.java) are QwU World's own, written from RFC 7845 and RFC 9559. QwU World's MIT licence does not cover the ports and tables. The ported source files and the headers whose definitions they use carry these notices:

Copyright (c) 2001-2008 Timothy B. Terriberry
Copyright (c) 2001-2011 Timothy B. Terriberry
Copyright (c) 2002-2008 Jean-Marc Valin
Copyright (c) 2003-2004, Mark Borgerding
Copyright (c) 2003-2008 Jean-Marc Valin
Copyright (c) 2003-2008 Timothy B. Terriberry
Copyright (c) 2005-2007, Xiph.Org Foundation
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Copyright (c) 2007 CSIRO
Copyright (c) 2007-2008 CSIRO
Copyright (c) 2007-2008 Xiph.Org Foundation
Copyright (c) 2007-2009 Timothy B. Terriberry
Copyright (c) 2007-2009 Xiph.Org Foundation
Copyright (c) 2007-2010 Xiph.Org Foundation
Copyright (c) 2008 Gregory Maxwell
Copyright (c) 2008 Xiph.Org Foundation
Copyright (c) 2008, Xiph.Org Foundation, CSIRO
Copyright (c) 2008-2009 Gregory Maxwell
Copyright (c) 2008-2009 Xiph.Org Foundation
Copyright (c) 2009-2010 Xiph.Org Foundation
Copyright (c) 2010 Xiph.Org Foundation, Skype Limited
Copyright (c) 2010-2011 Xiph.Org Foundation, Skype Limited
Copyright (c) 2011 Xiph.Org Foundation
Copyright (c) 2011 Xiph.Org Foundation, Skype Limited
Copyright (c) 2012 Xiph.Org Foundation
Copyright (c) 2013, Koen Vos. All rights reserved.
Copyright (c) 2024 Arm Limited

The CELT, src/ and include/ files are under the two-clause form of the licence below (without its third condition), the SILK files and libopus as a whole under the three-clause form. libopus's COPYING reads:

Copyright 2001-2023 Xiph.Org, Skype Limited, Octasic,
                    Jean-Marc Valin, Timothy B. Terriberry,
                    CSIRO, Gregory Maxwell, Mark Borgerding,
                    Erik de Castro Lopo, Mozilla, Amazon

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

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

- 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.

- Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific 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 OWNER
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.

Opus is subject to the royalty-free patent licenses which are
specified at:

Xiph.Org Foundation:
https://datatracker.ietf.org/ipr/1524/

Microsoft Corporation:
https://datatracker.ietf.org/ipr/1914/

Broadcom Corporation:
https://datatracker.ietf.org/ipr/1526/

Rounded-box distance formula. The rounded-rectangle distance in shaders/core/ui_sdf.fsh, shaders/core/ui_rounded_image.fsh and client/ui/SdfMath.java is the exact rounded-box distance function published by Inigo Quilez (article, "Rounded Box - exact"). It is a short mathematical formula, credited here and not claimed as QwU World's work; the article states no licence of its own.

Mojang. The material below is Minecraft's and is covered by the Minecraft EULA. Some entries are whole files, others are parts of files. None of it is QwU World's work or licensed by QwU World:

• The six effect shader programs in shaders/core/ use Minecraft's own vertex shader by reference ("vertex": "minecraft:blit_screen"), and shaders/core/ui_rounded_image.json uses "vertex": "minecraft:position_tex_color" the same way. The game loads them from the player's own copy of Minecraft; they are not in the Blocky Music jar. (An earlier development build shipped a byte-identical copy of blit_screen as fx_blit.vsh; it has been removed.) shaders/core/ui_sdf.vsh is QwU World's own.
• mixin/client/ChannelMixin.java is QwU World's code under MIT, except for one expression: the fallback buffer-size calculation, which repeats Minecraft's Channel.calculateBufferSize. That expression is not QwU World's and is not licensed by it.
• Model boilerplate: models/item/rap_god_config_wand.json is identical to Minecraft 1.21.1's assets/minecraft/models/item/blaze_rod.json apart from a final newline, and models/item/smiley_ball_spawn_egg.json and models/item/test_rap_god_master.json have the same content as Minecraft's spawn-egg item models ("parent": "minecraft:item/template_spawn_egg"). These are standard format boilerplate and are not claimed as QwU World's work.

SampleFocus sound.

• sounds/entity/smiley_damage.ogg is a sound from SampleFocus (its metadata says "Downloaded from Samplefocus.com"). QwU World decided on 17 September 2026 to keep it rather than replace it. Blocky Music uses it as part of the mod under the SampleFocus Standard License (https://samplefocus.com/license), which allows a sample to be used "as part of a new creative work", including games. It is not covered by QwU World's MIT or CC BY-NC 4.0 licences, and they give no right to it. Do not extract it from the mod, and do not redistribute it by itself or in substantially the same form.
• tools/vorbis-decoder-support/smiley_damage.libvorbis.f32 is the same sound decoded to raw samples by libvorbis. It is in neither the jar nor the public source repository: QwU World keeps it only in its private working copy, where the native-vorbis-decoder check compares the mod's own decoder with it. It is the same sound in another form, so the same terms apply to it, and the tools/ row of the MIT licence does not cover it.

Not in the public source repository

The public repository at https://github.com/QwU-World/blocky-music leaves out two files on purpose: sounds/entity/smiley_damage.ogg, because the SampleFocus licence allows it inside the mod, not on its own, and tools/vorbis-decoder-support/smiley_damage.libvorbis.f32, the same sound decoded for a check. A build from that source runs without them.

Pending confirmation

Nothing is waiting for confirmation: every file in the jar and in the repository is accounted for above.

Blocky Music asset licence

Blocky Music assets © 2026 by QwU World is licensed under CC BY-NC 4.0. To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/

The MIT-licensed files listed in NOTICE.md are under the MIT License in LICENSE. NOTICE.md also lists what neither licence covers, and explains the name "Blocky Music License" used on Modrinth for these terms together.

What this licence covers

Paths are relative to the repository root. In the released jar the files under src/main/resources/assets/music_battle/ sit under assets/music_battle/; the repository-root copies are not in the jar.

• src/main/resources/assets/music_battle/textures/
• src/main/resources/assets/music_battle/models/
• src/main/resources/assets/music_battle/blockstates/
• src/main/resources/assets/music_battle/blockbench/
• src/main/resources/assets/music_battle/player_animations/ (made from blockbench/bm_player_animation.bbmodel by tools/convert_blockbench_player_animations.mjs)
• src/main/resources/assets/music_battle/sounds/ and src/main/resources/assets/music_battle/sounds.json (sounds/ holds no sound of QwU World's own today: its one file is the SampleFocus sound excluded below, so the folder is in the jar but not in the public source repository)
• microphone.bbmodel in the repository root (a copy of blockbench/microphone.bbmodel)
• texture.png in the repository root (a copy of textures/item/microphone.png, the texture used by the root microphone.bbmodel)
• player anims.bbmodel in the repository root (an earlier Blockbench draft of the player animations, not used by the build; its six ref_ cubes are only the standard Minecraft player shape the animations are posed against)

Generated art is covered too, and its generator is the record of who made it: src/main/resources/assets/music_battle/textures/item/music_link.png is drawn by tools/make-music-link-texture.py in this repository out of the mod's own palette, so it is QwU World's own work. Change the drawing in that script and run it again rather than painting over the PNG.

Each of these is covered except the files listed in the next section.

What this licence does not cover

Excluded: third-party sound. QwU World does not hold the rights to this file, so it cannot license it. It stays in the mod by QwU World's decision of 17 September 2026: Blocky Music uses it as part of the mod under the SampleFocus Standard License (https://samplefocus.com/license), it is excluded from both of QwU World's licences, and it must not be extracted from the mod or redistributed on its own. Details are in NOTICE.md.

• src/main/resources/assets/music_battle/sounds/entity/smiley_damage.ogg (sample from SampleFocus; in the jar, not in the public source repository)

Excluded: third-party fonts and icons. They keep their own licences; details and full texts are in NOTICE.md and next to the files.

• src/main/resources/assets/music_battle/font/nunito-semibold.ttf, nunito-bold.ttf, nunito-extrabold.ttf and font/license-ofl.txt: Nunito, modified, SIL Open Font License 1.1 (The Nunito Project Authors)
• src/main/resources/assets/music_battle/textures/gui/workshop/icons_16.png, icons_32.png, icons_64.png and lucide-license.txt: Lucide icons, ISC (Lucide Contributors), partly also MIT (Feather, Cole Bemis)

Excluded: Minecraft model boilerplate. These files are identical to Minecraft's own item model files. They are standard format boilerplate and are not claimed as QwU World's work (see NOTICE.md).

• src/main/resources/assets/music_battle/models/item/rap_god_config_wand.json (same as Minecraft's models/item/blaze_rod.json)
• src/main/resources/assets/music_battle/models/item/smiley_ball_spawn_egg.json and src/main/resources/assets/music_battle/models/item/test_rap_god_master.json (same as Minecraft's spawn-egg item models)

Pending confirmation. Nothing is waiting for confirmation.

Also not covered:

• Code. Files under src/main/resources/assets/music_battle/shaders/ and src/main/resources/assets/music_battle/lang/, and the font definitions src/main/resources/assets/music_battle/font/ui_*.json, are among the MIT-licensed files listed in NOTICE.md (LICENSE). Some shaders use Minecraft's own vertex shaders minecraft:blit_screen and minecraft:position_tex_color by reference; those files are Mojang's, are loaded from the player's game and are not included (see NOTICE.md).
• Minecraft's own textures. Some model files name textures from Minecraft itself, for example minecraft:block/jukebox_side and minecraft:item/blaze_rod. The game loads those textures from the player's own copy of Minecraft. They are Mojang's, are not included in Blocky Music, and are not licensed here.
• Names and logos. "QwU World", "Blocky Music" and their logos, among them the Blocky Music logo src/main/resources/blocky_music_logo.png. CC BY-NC 4.0 itself says: "Patent and trademark rights are not licensed under this Public License" (Section 2(b)(2)).
• Music, beatmaps and anything players make or import. Blocky Music ships no music. Beatmaps, songs, cover images and other audio that a player creates, imports or shares belong to their owners. Nothing QwU World licenses covers them.

How to attribute

If you share these assets or something you made from them, Section 3(a) of the licence asks you to do the following. This is a summary; the legal code below is what counts.

1. Keep the following where QwU World supplied them with the material (Section 3(a)(1)(A)): the credit to the creator (QwU World), the copyright notice, a notice that refers to the licence, a notice that refers to the licence's disclaimer of warranties (Section 5), and a link to the material where reasonably practicable.
2. Say whether you changed the material, and keep any earlier note of changes (Section 3(a)(1)(B)).
3. Say the material is under CC BY-NC 4.0, and include the licence text or a link to it (Section 3(a)(1)(C)).

Section 3(a)(2) lets you do this "in any reasonable manner based on the medium, means, and context", including by linking to a page that has the required information. For example:

> Speaker texture from Blocky Music (https://qwu.world/mods/minecraft/blocky-music), © 2026 QwU World, > licensed under CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/). Recoloured by your name.

Leave out the last sentence if you did not change anything. Creative Commons' own summary is on the deed, and its guidance is in Recommended practices for attribution.

NonCommercial has the meaning in Section 1(i) of the licence: "not primarily intended for or directed towards commercial advantage or monetary compensation". For commercial use, ask QwU World first: it.qwuworld@gmail.com.

Full legal code

The text below is the plain-text legal code of CC BY-NC 4.0, copied without changes from https://creativecommons.org/licenses/by-nc/4.0/legalcode.txt (fetched 17 September 2026, SHA-256 41003d4a74749c0220e33dd415042164b5a1093ed401f36277234f772d22d3d0). Creative Commons publishes plain-text versions for projects that bundle licence texts with their files, and notes that the web version is the canonical one: https://creativecommons.org/licenses/by-nc/4.0/legalcode.en (source).

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