This app will not work on some browsers. I recommend the Firefox
Nineteen Equal Divisions of the Octave demo app.
19EDO demo web app. ©Copyright by John O'Sullivan, 5th October,
Press keys 1, 2, 3, 4, 5, 6, 7, 8, 9 or 0 to play beatless chords
that occur in 19EDO.
Pressing key 'o' will play chords in random order.
Try holding down the 'o' key continuously. If no chords can be
heard your key repeat rate is too fast...
On a Mac go to Apple Menu>>System Preferences>>Keyboard
and slow down the key repeat rate there.
On a PC go to Start and search for "Control Panel" to slow down the
keyboard key repeat rate.
*All* of the notes in this app pair nicely with each other,
meaning all chord progressions should be good (JRM strict).
The intervals in the chords on 1, 2, 3, 4, 5 and 0 are within 7.4
cents of 2:3:4:6:8.
The intervals in the chords on 6, 7, 8 and 9 are within 7.5 cents of
These chords are all lush and pretty much beatless.
1 = 0 cents 1/1
2 = 126c 15/14
3 = 253c 15/13
4 = 379c 5/4
5 = 505c 4/3
6 = 695c 3/2
7 = 821c 8/5
8 = 947c 19/11
9 = 1074c 13/7
0 = 1200c 2/1
Press P to hear John's Tune in Eagle JI
Press Space to stop
Click here to go to my main web page.
to go to my Eagle tuning group on Facebook.
Click here to download my treatise on 19EDO.