We present Chopin's Prelude in E-Minor (op.28 no. 4, "Suffocation") arranged for Harpischord, and tuned into Werckmeister 3, the well-temperament generated by four meantone fifths (C-G, G-E, D-A, B-F#) and eight pythagorean ones, probably used by Bach. Cent figures of the tuning (integer approximations): C = 0 C♯ = 90 D = 192 D♯ = 294 E = 390 F = 498 F♯ = 588 G = 696 G♯ = 792 A = 888 B♭ = 996 B = 1092