http://terpstrakeyboard.com/web-app/keys.htm

Terpstra Keyboard WebApp

[1x1]
Tuning\Layout Quick Links 
[Choose Preset                                                 ] 
Fundamental (Hz) [256                 ]
Right Facing Steps [4                   ] Up/Right Facing Steps
[7                   ]
Hex Size (pixels) [50                  ] Rotation (degrees)
[343.897886248       ]
Instrument [Piano                                  ] [ ] Enumerate
Scale [ ] Use Spectrum Colors [ ] Blank Keys (No labels)
[1x1]
                     [! 31-ed2 Bosanquet W]
                     [! 31-tone equal temp]
                     [!                   ]
                     [Terpstra Keyboard We]
                     [31                  ]
                     [!                   ]
                     [38.70968            ]
                     [77.41935            ]
                     [116.12903           ]
                     [154.83871           ]
                     [193.54839           ]
Scale (Scala format) [232.25806           ]
Steps To Equivalence Interval [                    ] Note Names 
[C                   ]
[D                 ]
[C#                  ]
[D                  ]
[Cx                  ]
[D                   ]
[E                 ]
[D#                  ]
[E                  ]
[Dx                  ]
[E                   ]
[F                  ]
Fundamental Color [#55ff55             ] Color Layout 
[ffffff              ]
[ff9f41              ]
[cfcfcf              ]
[bbaa93              ]
[7b7b7b              ]
[ffffff              ]
[ff9f41              ]
[cfcfcf              ]
[bbaa93              ]
[7b7b7b              ]
[ffffff              ]
[bbaa93              ]

[Make me a microtonal keyboard!]
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 1.5.2 (Jan. 2015 --
May 2019), released as Free/Libre and Open Source Software under
GPL-3.0. Download, fork, and get your name down here by fixing issues
and implementing features via GitHub!
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