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Hacker News
5/10

Tunings Notebook

A web workbook where music theory students play the same melody in 12-TET, Pythagorean, Quarter-Comma Meantone, and 5-limit Just Intonation side by side, with annotated scores that flag where the commas diverge.

Target user

Music theory undergraduates and musicology professors teaching comparative tuning systems

Features
  • Side-by-side playback of one melody across four tunings with synchronized cursor
  • Annotated score highlighting comma differences (e.g., Pythagorean vs Just third)
  • Lesson templates for Renaissance, Byzantine, Gamelan, and Indian classical modules
  • Export of tuning comparisons as audio or video clips for lectures
Why now

New releases in xenharmlib and Scala now support the full cosmos of regular temperaments, making a comparative teaching tool finally buildable without a research grant.

Signals · overall 5/10
Demand
3/10

Undergraduate music theory curricula focus on fundamentals and 12-TET; the HN trigger post only got 9 points and tools like Artusi/uTheory center on Theory I-IV with no tuning-comparison content, signaling a very small addressable audience.uTheory: Online music theory, rhythm and ear trainingArtusi: Pricing

Whitespace
6/10

Several standalone tuning-calculator/player tools exist (AudioCalcs, Calcimator, web Intonation, Sacrifunk Lab, Scale Workshop) but none offer a side-by-side annotated workbook for comparative pedagogy, leaving a narrow but real gap.Tuning System Calculator | CalcimatorScale Workshop — Grokipedia

Monetization
3/10

Music-theory EdTech competitors (Artusi, uTheory) lean freemium or institutional licensing; academic customers have notoriously tight discretionary budgets, and the tuning-comparison niche is too small for consumer subscription pricing.Artusi: PricingMusic Theory Test Prep Pricing | Worldwide

Longevity
7/10

Tuning theory is a centuries-stable academic subject and the xenharmonic community is gradually growing with mature library support (Scala, xenharmlib), supporting long-term relevance for a teaching tool.Scala Home Page

Feasibility
6/10

Tuning math is handled by xenharmlib/Scala and web audio synthesis is mature, but combining synchronized playback across systems with annotated score rendering (VexFlow/OSMD) and comma-flagging UX is non-trivial.Scale Workshop — Grokipedia

Xenharmlib (music theory library) adds support for Just Intonation · 9 points · 1 commentsHacker News · 2026-07-28 (today)