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• 13:33, 25 January 2026 Zhenlige talk contribs created page User:Zhenlige/The proportional-beating property of near-JI FDR chords (Created page with "As we all know, delta-rational (DR) chords have rational beating frequency ratios between fundamentals. What is less well-known is that, when the chord is fully DR, and approximates a JI chord with the same delta signature, the proportional-beating property also appears upper in the harmonic series. This makes DR chords usable even with higher pitches or wider voicings. Consider the isodifferential chord (0:1:2:...:(n-1))[+α] that approximate the JI chord (0:q:2q:....")