Appendix 4: Update History of this Website

21 September 2021: Added Vexilla Regis by A. Bruckner, with a diminished second D♯ - E♭ sounding just fine.
Added my view on how practical just intonation is.
Added an animation to Fugue in C minor on a theme by Legrenzi, BWV 574 by J.S. Bach.
28 July 2021: You can watch a mistery organist play two manual keyboards and the pedal keyboard on the just intonation organ: Suite Gothique, Toccata by L. Boëllmann.
26 July 2021: You can watch a mistery organist play the just intonation organ: BWV 534 Prelude, BWV 547.
The pedal keyboard design is obsolete. A new design is coming up.
27 May 2021: Matrix animation added for Fantasia in C minor, BWV 562 by J.S. Bach.
Improved earlier matrix animations (see below) in that the timing is now more accurate and syntonic commas are now also announced.
Improved the pitch assignment and extended the description of Os Justi.
7 April 2021: Added a matrix animation that shows all just intonation intervals while you hear them.
Added a matrix animation to Vox Humana.
Replaced sound files of Enharmonic equivalence by matrix animations.
20 March 2021: You can now actually watch intervals sound wrong: matrix animations added for Nimrod, Os Justi, BWV 578 and BWV 525 - Adagio.
3 January 2021: Manipulating Time I: What if ♩ < ♪ + ♪?
Manipulating Time II: What if the organist is not sober?
23 September 2020: Added a strings-like rendering of Enigma Variations, No. 9, "Nimrod" by E. Elgar, which took away my uneasiness with the tuning.
10 August 2020: Added some insight into how easy it is to play on the just intonation keyboard.
Changed the pitch drift graphs and added a call to violinists.
5 July 2020: The score of BWV701 was added, automatically annotated for just intonation.
2 July 2020: Final chord C-F♭-G considered for Suite Gothique, Toccata by L. Boëllmann.
Added a picture of a tilted pedal keyboard.
24 May 2020: Experiment with an odd organ stop added.
Rerecorded Trio Sonata in C minor, BWV 526 - Largo by J.S. Bach with this odd organ stop.
Experiment with two sine waves that beat in a reverberating hall.
15 January 2020: Clarified and otherwise improved many minor details.
15 December 2019: Overhauled Sleep (excerpt), by E. Whitacre: improved the chorus sound and the pitch assignment. Also extended the analysis: three very dissonant chords in which a harmonic interval of either 32/27 or 40/27 could not be avoided.
13 November 2019: Added a version of Sleep (excerpt), by E. Whitacre in 12 tone equal temperament, for comparison.
9 November 2019: Added Sleep (excerpt), by E. Whitacre with an analysis.
Simplified the pitch drift graphs.
4 September 2019: Added a section on enharmonic equivalence.
Added an analysis of a syntonic comma in BWV 526 - Largo.
21 May 2019: Added the Prelude of Prelude and Fugue in C major, BWV 547 by J.S. Bach.
Added a demo of the mean tone wolf fifth to Toccata cromatica per l'Elevazione by G. Frescobaldi.
15 April 2019: Added versions in twelve tone unequal temperaments (Kellner, Werckmeister, Neidhardt) to the first five pieces, for comparison.
Rerecorded Abendlied with vox humana stop.
Added a cents scale and explanation to the drift graphs (Reger trio, Os Justi, BWV 574).
19 March 2019: Added a version in sixth comma meantone tuning to Herr Christ der ein'ge Gottes Sohn, BWV 701 by J.S. Bach.
13 March 2019: Added a page with ongoing experiments to improve the algorithm to automatically assign pitches to notes.
20 February 2019: Added a partial analysis to Herr Christ der ein'ge Gottes Sohn, BWV 701 by J.S. Bach and cured a bad sounding harmonic pythagorean minor third.
Added a new optimizer hint type to the software for that.
24 January 2019: Added a page with feedback to this website.
Added a self test.
27 December 2018: Added interval analysis to Enigma Variations, No. 9, "Nimrod" by E. Elgar.
Added Abendlied, Op. 69, No. 3 by J. Rheinberger.
Added a Vox Humana stop to the virtual organ.
16 December 2018: Added Os Justi by A. Bruckner which is stated to cause serious pitch drift when sung by a choir.
8 December 2018: Added BWV 589 by J.S. Bach which requires a change in Bach's score to avoid a bad sounding syntonic comma.
25 November 2018: Described some ways to deal with beating, other than just intonation, with sound fragments.
14 November 2018: Described the wave table mechanism.
11 November 2018: Extended the pedal keyboard with a fourth row.
Designed the pitch selection control.
8 November 2018: Part two of automatically annotating sheet music: column shift annotations.
Added a fifth version (tempered just intonation) of the final chords of Suite Gothique, Toccata by L. Boëllmann.
Added a design for the pedal keyboard.
28 October 2018: Added two different versions of the final chords of Alma Redemptoris Mater by G. Dufay.
Explanation of the pitch assignment algorithm added. Part two.
Influencing the optimization algorithm: example added to Nun komm, der Heiden Heiland, BWV 659 by J.S. Bach
17 October 2018: Added Enigma Variations, No. 9, "Nimrod" by E. Elgar.
Added a pitch drift graph to Fugue in C minor on a theme by Legrenzi, BWV 574 by J.S. Bach.
Added four different versions of the final chords of Suite Gothique, Toccata by L. Boëllmann.
7 October 2018: Page about the syntonic comma added, with sound fragments.
Interval analysis added for Fugue in G minor, BWV 578 by J.S. Bach. Csv-files can be downloaded.
14 September 2018: Explained why this site was constructed in the first place.
Added sound fragments to the explanation why just intonation is not an ideal tuning.
Explained how ordinary music score can be automatically annotated for just intonation. Part one.
31 August 2018: The tones actually used in a piece are now listed. See for instance Trio Sonata in C minor, BWV 526 - Largo by J.S. Bach.
Analysis of measure 50 of Fugue in G minor, BWV 578 by J.S. Bach was added, explaining an unavoidable syntonic comma.
Explanation of the pitch assignment algorithm added. Part one.
7 August 2018: Original publication of the website.

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