Collaborative Coding with Music: Two Case Studies with EarSketch

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EarSketch is a web DAW where students write Python or JavaScript to program music via an API for loops, one‑shots and effects and it already serves 15–20k students/month. New collaboration adds link sharing, snapshots, and real‑time jamming by locking browsers to a global clock using NTP time sync and quantizing play events to beats. Client sync uses an operational transform implemented from scratch (no off‑the‑shelf OT). A ten‑player study finds one shared script is chaotic, per‑track soloing is musically usable, and three scripts reduce visual churn but worsen time fragmentation.

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" chapters (10)

1. 0:00Introduction
2. 0:47About EarSketch
3. 1:20Collaborative Coding
4. 1:53RealTime Collaboration
5. 3:05Classroom Collaboration
6. 4:03Remote Collaboration
7. 4:51ClienttoClient Sync
8. 5:42One Script Shared
9. 7:28Three Script Shared
10. 8:10Future Work