THIRD-PARTY NOTICES · OPEN-SOURCE SOFTWARE ATTRIBUTIONS

HIFILAT SmartAudio Manager uses, includes or interacts with the following open-source software components and third-party services. Each is governed by its own license, which prevails over the provisions of the HIFILAT EULA solely with respect to that component.

This document fulfills the attribution obligations of the applicable OSS licenses. All components included in the product are under permissive licenses (BSD / MIT / OFL / LGPL); no component under a strong copyleft (GPL) license is redistributed within the product.

1. PYTHON DEPENDENCIES (included in the backend)

Flask · Werkzeug · Jinja2 · MarkupSafe · itsdangerous

License: BSD-3-Clause
Copyright: © Pallets
URL: https://flask.palletsprojects.com/
Use: web framework for the local HTTP backend.
The full licenses travel in the backend bundle (_internal/*.dist-info/).

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 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ```

> Note: reading FLAC tags is done with proprietary code in pure Python (flac_meta.py); writing tags is done via ffmpeg. SmartAudio does not depend on mutagen (GPL).

2. EXTERNAL AND NATIVE BINARIES

FFmpeg

License: LGPL v3 (configured with --enable-version3 and without GPL codecs such as libx264/libx265/fdk-aac). On Windows, static win64-lgpl build from BtbN; on macOS, equivalent LGPL build for arm64 (to be verified with ffmpeg -buildconf: without --enable-gpl).
Copyright: © FFmpeg developers · URL: https://ffmpeg.org/ · Terms: https://www.ffmpeg.org/legal.html
Use: format conversion (FLAC ↔ MP3/AAC/Opus/Ogg/WAV), tag writing and analysis (BPM/key).
It is distributed unmodified, as a standalone executable (ffmpeg.exe on Windows, ffmpeg on macOS) that SmartAudio invokes via subprocess (it does not link against its libraries). The user may replace it with another compatible ffmpeg build (this satisfies the LGPL right of substitution — see §6).
Corresponding source code: ffmpeg.org (FFmpeg git) + the build scripts at https://github.com/BtbN/FFmpeg-Builds (see §6).

libdiscid (reading the CD TOC)

License: LGPL 2.1+ · Operated by: MetaBrainz Foundation · URL: https://musicbrainz.org/doc/libdiscid
Use: reading the CD TOC (MusicBrainz disc-id). It is included on both platforms, unmodified: on Windows discid.dll (0.6.5, x64); on macOS libdiscid.0.dylib (0.6.4, arm64).
It is distributed as a separate library alongside the executable; the user may replace it with their own libdiscid build (the app loads it dynamically from the backend directory) — this satisfies the LGPL substitution/re-linking requirement (see §6).
Corresponding source code: https://github.com/metabrainz/libdiscid and http://ftp.musicbrainz.org/pub/musicbrainz/libdiscid/ (see §6).

External CD tools (cdparanoia / cd-discid)

License: GPL-2.0+ · Use: CD audio extraction on Windows (cdparanoia, if present on the system) and, on macOS, TOC identification only as a fallback if libdiscid were not available (cd-discid).
Important: these tools are invoked as external system executables and are NOT redistributed within HIFILAT's product. No GPL code travels in the package.

Python

License: PSF License · Copyright: © Python Software Foundation · URL: https://www.python.org/
Use: backend runtime (included in the build).

3. EXTERNAL WEB SERVICES (queried only at the user's request)

MusicBrainz API — MetaBrainz Foundation Inc.

URL: https://musicbrainz.org · Data: CC0 1.0 (public domain)
Use: metadata search by recording-id, disc-id or text. Fair use: max. 1 request/sec, User-Agent with contact email.

LRCLIB API

URL: https://lrclib.net · Data: community-submitted
Use: search for synchronized and plain-text lyrics.

> The connections to these services are described in PRIVACY_POLICY.md and only occur when the user requests them.

4. FONTS (included)

Bricolage Grotesque

License: SIL Open Font License 1.1 (OFL)
URL: https://github.com/ateliertriay/bricolage
Use: interface typeface, included with the product (static/fonts/*.woff2). Full license text: static/fonts/OFL-Bricolage.txt.

SmartAudio does not use fonts with restrictive licenses; the interface typeface is distributed under OFL.

5. ICONOGRAPHY

Phosphor Icons

License: MIT · Copyright: © Phosphor Icons · URL: https://phosphoricons.com
Use: interface icon set (SVG), included with the product.

``` MIT License — Copyright (c) Phosphor Icons

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. ```

6. LICENSE COMPLIANCE

Everything included in the product is under permissive licenses: BSD (Flask et al.), MIT (Phosphor), OFL (Bricolage), LGPL (ffmpeg LGPL build, libdiscid) and PSF (Python).
The GPL tools (cd-discid, cdparanoia) are used only as external system executables and are not redistributed with the product → there is no copyleft obligation on the SmartAudio code, which is not a derivative work of them.

Included LGPL components (ffmpeg, libdiscid) — detailed compliance

SmartAudio complies with the LGPL for the two LGPL components that it does distribute:

1. Without modification. The binaries are included as-is as published by their projects (they are not patched or recompiled): on Windows ffmpeg.exe and discid.dll; on macOS ffmpeg and libdiscid.*.dylib. ffmpeg is an LGPL v3 build (--enable-version3, without GPL codecs). 2. Replaceable form (right of substitution / re-linking). Both are delivered as separate files alongside the backend, not statically linked within the proprietary binary: the ffmpeg executable is invoked via subprocess and the libdiscid library is loaded dynamically from the executable's directory. The user may replace them with their own version (even a modified one) by replacing those files — exactly what the LGPL requires (LGPL-2.1 §6 / LGPL-3.0 §4). 3. License notice. This document preserves the copyright and license notice of each component. 4. Offer of corresponding source code. The source code of the distributed versions is publicly available:

FFmpeg — code: https://ffmpeg.org/download.html (FFmpeg git); LGPL build scripts:

https://github.com/BtbN/FFmpeg-Builds

libdiscid — https://github.com/metabrainz/libdiscid and

http://ftp.musicbrainz.org/pub/musicbrainz/libdiscid/ In addition, HIFILAT will provide a copy of the corresponding source code to anyone who requests it by writing to contacto@hifilat.com, during the period required by the license.

> Where to see it in the app: these license notices are accessible from Settings → Legal notices and licenses.

7. UPDATES

This document is updated when dependencies are added/removed or their licenses change. Technical source of truth for the team: Desarrollo/THIRD-PARTY-LICENSES.txt.

8. LANGUAGE

The original version of this document is written in Spanish. Any translation into another language is provided for informational purposes only; in the event of any discrepancy, the Spanish version shall prevail.