Terpstra Keyboard WebApp

Tuning\Layout Quick Links Choose Preset Jankó / 6-6/Balanced/Symmetric/Bilinear/Uniform Harmonic Table / Sonome / Tonnetz / 5-L Lattice / Matrix Model Wicki-Hayden B-System Chromatic Button C-System Chromatic Button 7-JI Rast Maqam / Eight Echos — Bosanquet / Wilson / Terpstra 12-JI-7L Jankó / 6-6/Balanced/Symmetric/Bilinear/Uniform 12-JI Jankó / Ben Johnston (1978 Suite for Microtonal Piano) 12-JI Jankó / Ben Johnston (1978 Suite for Microtonal Piano) Rhodes 432 17-JI-5L-Arabic-theoretical Bosanquet / Wilson / Terpstra 17-JI-11L-Wilson Bosanquet / Wilson / Terpstra 22-JI-5L-Indian Bosanquet / Wilson / Terpstra 31-JI-7L-Fokker Bosanquet / Wilson / Terpstra 43-JI-11L-Partch Bosanquet / Wilson / Terpstra 53-RI-3L Bosanquet / Wilson / Terpstra Male (Western) 53-RI-3L Mirrored Bosanquet/Wilson / Terpstra Female (Eastern) Erv Wilson 11 Limit 17 Tone Harry Partch 43 Janko 19-ed2 Bosanquet / Wilson / Terpstra 22-edo 31-ed2 Bosanquet / Wilson / Terpstra 41-ed2 Bosanquet / Wilson / Terpstra 12ET Janko 12ET Wicki-Hayden 19ET Janko 31ET Janko 31ET Wicki-Hayden 31ET 11 Limit TOP Janko 53ET Janko 72 EDO Fundamental (Hz)

Right Facing Steps Up/Right Facing Steps

Hex Size (pixels) Rotation (degrees)

Instrument Piano Harpsichord Rhodes Harp Choir Strings Sawtooth Gayageum Qanun Organ Organ + Leslie Marimba Music Box WMRİ 3-Limit (4 Harmonics) ST WMRİ 5-Limit (6 Harmonics) ST WMRİ 5-Limit (6 Harmonics) Pk WMRİ 7-Limit (10 Harmonics) ST WMRİ 11-Limit (12 Harmonics) ST WMRİ 13-Limit (16 Harmonics) ST WMRİ n-Limit ("sawtooth wave") ST WMRİ Byzantine (9 Harmonics) ST Enumerate Scale Use Spectrum Colors Blank Keys (No labels)

Scale (Scala format) ! wilcent17.scl ! 11-limit 17 tone scale by Erv Wilson ! Fokblock([64/63, 56/55, 968/945, 36/35], [5, 6, 11, 6]) = ! Fokblock([64/63, 56/55, 36/35, 704/675], [5, 3, 6, 11]) = ! Fokblock([64/63, 968/945, 36/35, 704/675], [5, 13, 6, 6]) wakalix 17 ! 22/21 11/10 9/8 7/6 11/9 5/4 4/3 11/8 22/15 3/2 11/7 44/27 5/3 7/4 11/6 15/8 2/1

Steps To Equivalence Interval Note Names R 22/21 11/10 9/8 7/6 11/9 5/4 4/3 11/8 22/15 3/2 11/7 44/27 5/3 7/4 11/6 15/8

Fundamental Color Color Layout 47A2FF FFE496 FFC37D 47A2FF FFE496 FFC37D 47A2FF 47A2FF FFC37D FFC37D 47A2FF FFE496 FFC37D 47A2FF FFE496 FFC37D 47A2FF

Designed by Siemen Terpstra in the late ’80’s. WebApp developed by James Fenn with additions and modifications by Brandon Lewis, Bo Constantinsen and Chengu Wang. Credits to Scott Thompson and Dr Ozan Yarman for contributing samples. Current version 1.2 (Jan. 2015 — Jan. 2017), released as Free/Libre and Open Source Software under GPL-3.0. Fork me on GitHub!