Isokratis Piano is a digital microtonal tunable piano/isokratis, allowing for arbitrary N-ET step (incl. half-step) sharps and flats, individually in each piano key of the octave of the selected scale family (In-app), along with N-ET pitch shift, for adjustable N. It further, features (97+)-key Piano (with octaves' shift), Button Keys (In-app) instead of Piano Keys, and contains Piano, Isokratis voice, and ability to add your own Isokratis voices (In-app), and synthetic Choir sounds, Metronome, Chrononome, Virtual LCD, different Reference Frequencies (e.g. A4 440 Hz, C4 256 Hz, C4 220 Hz), 12-ET (Western Music) and Byzantine Scales' selection capabilities, and many more. * If you like our Isokratis Piano app, please give us a positive rating to help our development efforts! If you face any problems, or for any feedback, please contact us at the support email. * For best sound experience please connect the sound output to good speakers or to your home theater amplifier. * Works also offline (without internet connection)

Available on



Version notes

Version number: 2015.1120.1943.3583

* Thank you for your ratings and communication that help us in our work. Isokratis Piano works also offline (without internet connection) Release 10.4.1 * New sound "Isokratis P2 -12" * Windows 10 bug fix Release 10.3.0 * Fix for various text size percentages under Windows 10 Release 10.2.0 * Fix for Windows 10 Release 9 * Νew sound choir sPro light (in the main package of Isokratis Piano) * New: Fade-In Time adjustment (for Isokratis-like sounds) * Isokratis-like Sounds now reach up to upper G/Di’ * Larger Octave Shift buttons * Reference frequency selection bug fix Release 8 * Choir sPro sound of Release 7 was renamed to the “sPro bass” in this Release. * Νew sound choir sPro (in the main package of Isokratis Piano). * 4 additional sounds (+12), (-12), which are recommended when the pitch shift is above 12 moria, or below -12 moria correspondingly (they’re also in the main package). * Selection of the Sounds can now be done also from the main screen. * Selection of the Pitch Shift step can now be done also from the main screen. * Arbitrary Pitch Shift can now be set directly by typing (which might be truncated to the corresponding limits) * In App: Button Keys, Chroas Etc., are free. Isokratis Piano's 23-page User's Guide for the Release 8 is also available at: Release 7 * sPro synthetic Choir (new sound added to the main package)


  • Key Tuning (Scale Tuner): Programmable N-ET step (incl. half-step) tuned sharps and flats, individually in each piano key (In-app); Load/Save tunings
  • Scales: 12ΕΤ, Byzantine Scales (Committee 1881, Chrysanthos), Didymos (non-tempered)
  • Sounds: Piano, Isokratis 1 (human voice), synthetic sPro Choir, synthetic sPro Choir light, synthetic sPro bass Choir, synthetic Choir 1, synthetic Choir 2
  • Ability to Load/Play your own .wav Isokratis' voices (In-app), taking advantage of the app's vast capabilities (piano soundboard)
  • Metronome (European), Chrononome (Byzantine) with virtual "LED" and sound
  • Pitch Shift: arbitrary (limited) or in steps of configurable N-ET intervals; N-ET steps/cents (decimal numbers) with adjustable N from 12-99999
  • 97-key Piano (+optional B#, E# black keys), C0-C8 or G0-G8 (with octaves’ shift), 2-4 full octaves' display (with Piano sound)
  • Button Keys (In-app), instead of Piano Keys, for Isokratis usage
  • Fade-In Time and Release Time adjustment
  • Continuous Key press mode (Hover/Hold modes), for Isokratis and Synthetic Choir sounds
  • Byzantine Piano (with Byzantine Scales)
  • Chroas (In-app)
  • Virtual LCD displaying useful information
  • Tone intervals between the Keys, Keys' frequencies on top of the Keys, Personal Settings saving capability
  • Key labels choice: Byzantine Music Martyrias, Tone names (Ni, Pa, Vou, ...), European notation (Do, Re, Mi, ...), US notation (C, D, E, …)
  • 4 different reference frequencies (Ke/A 440, Ni/C 261.63, Ni/C 256, Ni/C 220)
  • Volume Control (logarithmically, and independent of computer’s volume control)
  • Keyboard help (piano keys - keyboard keys correspondence appearance) / Keys' size change
  • Adjustable app width (to be used in parallel with your favorite eBook reader), Background image selection
  • Multi-touch, Keyboard, Mouse input

System Requirements

OS Windows 10, Windows 8.1
Architecture x64, x86
OS Windows 10, Windows 8.1
Architecture x64, x86

Additional info

Published by
Παναγιώτης Παπαδημητρίου
Copyright © 2014, Π. Παπαδημητρίου.

Approximate download size
160.15 MB


In-app purchases

Install on up to ten Windows 10 devices.

Language supported
English (United States)
Ελληνικά (Ελλάδα)

Publisher Info
Publisher Website
Publisher Support

Additional terms
Isokratis Piano license terms
You can't reverse-engineer this software. You can't copy partially or fully this software. You can't alter this software.

Ratings and reviews

Filter by:

To rate and review, sign in.

Sign in




Platform: PC

thank you very cool and useful

thank you very cool and useful

Developer comment · Responder 0000 responded on 9/6/2015

Thank you very much!

One person found this helpful.



Developer comment · responded on