README.md

metadata

license: cc0-1.0
license_name: mixed-cc0-cc-by
pretty_name: CometBeat Assets
tags:
  - music
  - music-education
  - soundfont
  - musicxml
  - abc
  - kern
  - gabc
  - midi

CometBeat Assets

Curated, rights-verified assets for the CometBeat music-education app — SoundFonts, instruments, samples, and a large symbolic score corpus. Every item is published with a per-item license + attribution in the catalog JSON.

What ships here (tiers)

Only Tier A and Tier B are published. Tier C (Share-Alike) and Tier D (Non-Commercial) are never in this dataset.

Tier	Licences	Obligation
A	CC0 / Public Domain / MIT	none
B	CC BY 3.0 / 4.0 (attribution)	must credit the author — carried per item in attribution, shown in the app's "Sources & credits"
C	CC BY-SA / ODbL (share-alike)	not published here
D	any Non-Commercial	not published here

Attribution (Tier B)

Each Tier-B item carries an attribution string (composer / editor / source). Re-users must preserve it. Sources of the Tier-B content: NIFC / The Fryderyk Chopin Institute (Polish scores + Chopin first editions, CC BY), Mutopia Project (CC BY items), EGSet12, and CC-BY tracker modules.

Layout

• catalog/index.json — the small index the app reads first (per-kind shards).
• catalog/{soundfont,instrument,sample,module,score}.json — per-kind shards; each item has license, attribution, tier (A/B), path.
• catalog.json — the full combined catalog.
• assets/…, gregobase/…, nifc/…, pdmx/…, mutopia/…, … — the payloads (score paths are md5-bucketed so no directory exceeds HF's 10k-files limit).

Content policy: symbolic music only (MIDI/MusicXML/kern/ABC/GABC/GP) + audio only as an instrument/sample payload (SFZ/SF2). Provenance is verified per source; the publish gate excludes Share-Alike, Non-Commercial, and unclear-licence material.