[pianotech] Aurally pure octaves

[Richard Brekne]

Given his earlier published methods.... I'd question this.

Cheers
RicB


    I know the 3:1 test that you mention and also a 6:2 test for
    beatless 12ths, but Mr. Stopper has repeated many times that his
    12ths are not beatless but at a “sweet spot”. I am hoping to learn
    what the aural tests for this “sweet spot” are.