Build a Band — recorded-instrument edition, 2026-10-19

PIANO, ACOUSTIC GUITAR, ELECTRIC BASS
Nicholas Brosowsky, tonejs-instruments, CC BY 3.0.
https://github.com/nbrosowsky/tonejs-instruments
https://creativecommons.org/licenses/by/3.0/
Pinned revision: 622c2f1c32c8cfce4158ddc3eb26e518ddef37e5
Piano origin: Versilian Studios Chamber Orchestra (VSCO 2).
Guitar origin: University of Iowa Electronic Music Studios.
Bass origin: Karoryfer Samples.
Collection editing/normalization: Nicholas Brosowsky.
Four original piano MP3s: samples/piano/C4.mp3, E4.mp3, G4.mp3, C5.mp3.
Local files: band-piano-C4.mp3, band-piano-E4.mp3, band-piano-G4.mp3,
band-piano-C5.mp3. Files unmodified; playback trims silence, normalizes,
fades and repitches notes. Sampled notes are not a new recorded performance.

DRUMS
Virtuosity Drums, Versilian Studios and Karoryfer Samples; CC0 1.0.
Performed by Austin McMahon; recorded at Virtuosity Musical Instruments, Boston.
https://github.com/sfzinstruments/virtuosity_drums
https://creativecommons.org/publicdomain/zero/1.0/
Pinned revision: 9f04cf9a734527edfbb0a4eee1f674e45bbf71bc
Drums/guitar/bass reuse LearnPlay's /music-samples-v2/ recordings.
Exact original URLs and hashes: /music-samples-v2/sources.json
Additional attribution: /music-samples-v2/CREDITS.txt

MELODIES
Twinkle, Twinkle, Little Star: traditional French melody, Ah! vous dirai-je,
maman (18th century). Historical score collection:
https://www.loc.gov/resource/music.mussm-sm1879-02893/
Mary Had a Little Lamb: traditional nursery melody associated with Lowell
Mason (19th century). Historical music reproduction:
https://commons.wikimedia.org/wiki/File:Mary%27s_Lamb_music.jpg
Frere Jacques: traditional French round (published before 1900).
Historical source: Charles Lebouc, Recreations de l'enfance (1860).
These old melodies are public domain in the United States. We use our own
simple note transcription and new bass/drum arrangements, not a modern
artist's arrangement, vocal recording, backing track or children's video.
Sunny stroll, Space bounce, Gentle moon: original LearnPlay melodies.
All are instrumental, without recorded vocals.

SOFTWARE
LearnPlay interface, sampled Web Audio engine and new arrangements: MIT,
copyright 2026 LearnPlay contributors; /play-lab-LICENSE.txt.
Complete readable sources: /band-studio.js and /band-songbook.js.
The first edition used John Nesky's MIT BeepBox 4.2.0 synthesizer.
Its source and notices remain at /vendor/beepbox/ but the recorded-instrument
edition does not load it. No endorsement by upstream contributors is implied.