This instrument is a port of a Michael Gogins CsoundAC instrument. It is moddled after LaMonte Young and Just Intonation.
Young?s drones consists of the mere persistence of long loud tones in a reverberant space.

Setting the fundamental frequency to low values is nice, but higher settings produces nice aery sounds as well.

This is (the condensed version of) the sore of Michaels CsoundAC instrument.
; p1 p2 p3 p4 p5 p6 p7
; insno onset duration numerator denominator amplitude pan

; just intonation, 3 chords :C major 7, G major 7, G 7, C major with voice leading.

i 1 0 6 1 1 .2 -0.875
i 1 0 18 3 2 . 0.000
i 1 0 6 28 15 . 0.875

i 1 30 6 9 8 . 0.875
i 1 30 3 10 7 . -0.875
i 1 30 3 4 3 . 0.875

i 1 60 6 1 1 . -0.875
i 1 60 6 5 4 . 0.000
i 1 60 6 2 1 . 0.875

version 1, January 2016
- AD envelope for amplitude
- fundamental frequency can be set at will