Music & Engineering From Finale to the Web How 30 years of pitch class set composition — from hand-entered Finale files to AI-assisted book production — became 78 published volumes and counting. Bruce ArnoldMusic & Technology The Sound Cells series did not begin as a publishing project. It began as a compositional practice — Bruce[…]

Music & Engineering Acoustic Engineering of the Guitar How the physical construction of the guitar — string tension, body resonance, fretboard geometry — shapes which trichords are most naturally playable, and why the instrument is uniquely suited to the hexatonic approach. Bruce ArnoldMusic & Engineering The guitar is an engineering artifact — a physical system[…]

Music & Engineering Building the MetroDrone The engineering design of an ear training tool that combines a drone and metronome — and why two simple functions require surprisingly careful engineering to work well together. Bruce ArnoldMusic & Technology The MetroDrone is the best-selling product in the Muse Eek catalog — not because it does something[…]

Music & Technology Cloudflare R2 and Music Distribution How modern content delivery infrastructure solves the problem of distributing a 5TB music catalog — and what this means for independent music education publishers. Bruce ArnoldMusic & Technology The Sound Cells series generates approximately 5 terabytes of audio, scores, and metadata across its 78 volumes. A generation[…]

Music & Technology MIDI, LilyPond, and the Production Pipeline How a pitch class set becomes a printable score and a streamable audio file — the complete technology stack behind the Sound Cells series. Bruce ArnoldMusic & Technology A finished Sound Cells volume contains several distinct output types: a PDF score in standard music notation, MP3[…]

Music & Technology SuperCollider and Pitch Class Sets How algorithmic composition tools change the way a composer thinks about pitch class sets — and what it means to use code as a compositional medium. Bruce ArnoldMusic & Technology SuperCollider is a programming language for real-time audio synthesis and algorithmic composition. First released in 1996, it[…]

Music & Technology Generating 9,240 Trichord Permutations How Python, SuperCollider, and AI assistance were used to build the computational backbone of the Sound Cells series — and what it means to automate music theory at scale. Bruce ArnoldMusic & Technology The Sound Cells series is built on a complete enumeration of trichord pair combinations —[…]

Music & Mathematics The Pitch Class Set as a Power Set How every scale contains every chord hidden within it — and why the power set is the complete map of Western harmony. Bruce ArnoldMusic & Mathematics In set theory, the power set of a set S is the collection of all subsets of S[…]

Music & Mathematics Why 137 = 026 The number theory connecting the fine structure constant of physics to the interval arithmetic of the 026 trichord — and why this is more than a numerical coincidence. Bruce ArnoldMusic & Mathematics The first article in this series introduced the fine structure constant α ≈ 1/137 and Bruce[…]

Music & Science The Charlie Banacos Method as Neuroscience How one of the great ear training teachers of the twentieth century built a pedagogy that anticipated the neuroscience of auditory learning decades before the research confirmed it. Bruce ArnoldMusic & Science Charlie Banacos (1946–2009) was a Boston-based pianist and teacher who, for four decades, taught[…]