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Eagle 53 - Eagle Heart demo web app. ┬ęCopyright by John O'Sullivan, 29th December, 2021.

Press keys 3, 4, 5, 6, 7, 8 or 9 to play beatless chords that occur in Eagle 53.

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.

The root notes in all of the chords pair nicely with each other, melodically,
meaning all progressions should be acceptable (JRM loose). All of the intervals in all of
the chords are within 0.1 cents of just. Each chord looks like 2:3:4:6:8
The root notes of the chords correspond closely to the 3:4:5:6:7:8:9 scale.
Either F chord (4 or 8) functions as a tonic or point of rest. All of the chords conform to the Eagle 53 tuning.

Here are the chords used...

3 - C  -498.1c (3/4)
4 - F        0.0c (1/1)
5 - A   384.9c (5/4)
6 - C   701.9c (3/2)
7 - D# 973.6c (7/4)
8 - F  1200.0c (2/1)
9 - G 1403.8c (9/4)

Press Q to hear a 3:4:5:6:7:8:9:10 chord in 12 Tone Equal Temperament
Press W to hear a 3:4:5:6:7:8:9:10 chord in Eagle 53
The 4(F) in the Eagle chord is 13 cents higher than the 4(F) in the 12TET chord

Press P to hear John's Tune in Eagle JI
Press Space to stop
Click here to go to my main web page.
Click here to go to my Eagle tuning group on Facebook.