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2026-05-06 17:56:38 +02:00
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+Bach to Basics
+Copyright (c) 2025 gigliof
+
+This product includes the following third-party components. Each is subject
+to its own license terms; check the upstream project for the full text.
+
+────────────────────────────────────────────────────────────────────────────
+Bundled assets
+────────────────────────────────────────────────────────────────────────────
+
+frontend/public/soundfont/sonivox.sf3
+    SONiVOX Embedded Audio Synthesis (EAS) soundfont, originally released
+    as part of the Android Open Source Project under the Apache License 2.0.
+    Used here as the AlphaTab playback soundfont.
+
+────────────────────────────────────────────────────────────────────────────
+Frontend dependencies (selected — full list in frontend/package.json)
+────────────────────────────────────────────────────────────────────────────
+
+  AlphaTab                 — MPL-2.0            (sheet music renderer)
+  PixiJS                   — MIT                (WebGL renderer)
+  Tone.js                  — MIT                (audio scheduling)
+  smplr                    — MIT                (sample-based instruments)
+  WebMidi.js               — Apache-2.0         (MIDI input)
+  React                    — MIT
+  Zustand                  — MIT
+  Vite                     — MIT
+  Tailwind CSS             — MIT
+
+MPL-2.0 note: AlphaTab is consumed unmodified as an npm dependency. MPL-2.0
+is per-file copyleft — if you modify AlphaTab's own source files you must
+share those changes under MPL-2.0, but the rest of this codebase remains
+under MIT.
+
+────────────────────────────────────────────────────────────────────────────
+Backend dependencies (selected — full list in backend/requirements.txt)
+────────────────────────────────────────────────────────────────────────────
+
+  music21                  — LGPL-3.0           (music theory + MusicXML)
+  FastAPI                  — MIT
+  defusedxml               — PSF-2.0
+  pianoplayer              — MIT                (Parncutt fingering algorithm)
+  yt-dlp                   — Unlicense          (YouTube audio extraction)
+  pdf2image                — MIT
+  Basic Pitch (optional)   — Apache-2.0         (audio → MIDI transcription)
+
+LGPL note (music21): used as a pure Python library import, unmodified.
+
+────────────────────────────────────────────────────────────────────────────
+Optional external tools (NOT bundled — user installs separately)
+────────────────────────────────────────────────────────────────────────────
+
+  Audiveris 5.x            — AGPL-3.0           (PDF → MusicXML OMR)
+
+Audiveris is invoked as a subprocess if the user places audiveris.jar at
+backend/bin/. Because it's distributed separately by the user (and is
+optional), the AGPL obligations apply only to anyone redistributing the
+JAR or hosting Audiveris itself — not to this codebase.