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Tonal Systems Annotation Library & Licensing Service

A curated, professionally-annotated digital library of compositions and analyses across obscure tonal systems (four-tonic, microtonal, spectral, etc.), with licensing for educators, composers, and students. Each piece includes structural breakdowns, voice-leading diagrams, harmonic function maps, and contextual essays—built by working composers and theorists, not AI. Institutions and individuals license access; composers license their own work through the platform for royalties.

SERVICE

42 weeks • 70% confidence

Value Proposition

Replaces fragmented forum-hunting and paywalled academic papers with a single, professionally-vetted, searchable library organized by tonal system and compositional challenge. Composers see real, playable examples with clear explanations of *why* choices work. Educators get ready-made lesson materials. Rights-holders (composers) earn recurring revenue.

Target Audience

Music theory professors (K-12 and university), composition students, professional composers exploring non-Western/experimental systems, conservatory libraries, online music schools

Key Features

  • Searchable database indexed by tonal system, composer, era, instrumentation, and compositional technique
  • Each piece includes: score (PDF/MusicXML), audio, structural analysis, voice-leading diagrams, harmonic function annotations, and a 500-1500 word essay on the system's application
  • Comparison view: side-by-side analysis of how two different composers handle the same tonal system
  • And more, with full implementation detail...

Tech Stack

Web stack: React frontend, Node.js/Express backend, PostgreSQL for metadata and user data Score rendering: Verovio (open-source, MusicXML viewer) Audio: Web Audio API for playback, optional Spotify/SoundCloud embeds for recordings LMS integrations: LTI 1.3 standard for Canvas, Blackboard, Moodle compatibility
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Original Problem

Musicians and music theorists struggle to understand and apply obscure tonal systems in composition and analysis

Musicians, composers, and music theory students encounter specialized tonal systems like the four tonic system but lack clear, accessible explanations of how they work and when to use them. Existing resources are fragmented across forums and academic papers, making it difficult to find practical guidance. Current solutions fail because they're either too theoretical without application examples, or scattered across multiple sources requiring extensive research.

Score: 45.3%

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