What about other readings of the same Bach diagram, for example the proposed method by Emile Jobin taking the various loops differently?
His reading assigns 1/4 syntonic comma narrow to C-G-D-A-E-B, pure B-F#-C#-G#, approximately 1/12 comma wide Ab-Eb-Bb-F each, and the (arbitrary) F-C pure off the ends. This is an excellent example of an ordinary temperament. It is beautifully effective for most of the 17th century French/Italian/English repertoire. It also works nicely for most of the first three books by Francois Couperin (published 1713-1722), although ordre 18 is questionable…and ordres 25-27 from the fourth book (1730) are seriously problematic as well. But more importantly, as a proposed method for playing Bach’s music and specifically the WTC book 1, which should be the most obvious place it needs to work, it gives some remarkably rough sounds. Try, for example, the F minor and B-flat minor preludes and fugues, and the C# major, F# major, and A-flat major. Even the G minor and C minor pieces have some abruptly sour moments. (The reason for these problems is explained thoroughly in the “enharmonics” section of
Related Questions
- What about other readings of the same Bach diagram, for example the proposed method by Emile Jobin taking the various loops differently?
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