Prelleur (was thoughts)

I wrote
>The changing of the tuning for Mozart is the subject of our next CD,
>where we will present the K385 in three tunings. Listening to the ET
>version after one on the Prelleur temperament is enlightening, to say
>the least.

jdl writes:
>> BTW, could you
give the numbers on the Prelleur temperament?>>

Greetings,
Jorgensen give the following cents deviations from ET.
A =0
A# = + 4.3
B = -1.6
C = + 4.3
C# = -.4
D = + 1.6
D# = + 3.1
E = -.4
F = + 5.3
F# = -.8
G = +2.3
G# = +1.2

This temperament is listed as one of the earliest refinements of
Werckmeister's rules. I suppose it would have been in use during Mozart's
time. Published in 1731, it reaches its limit of "expression" in C# with a
tonic third of 19.5 cents. F-A is its best third, creating "home" key of F
(ala Valotti), as opposed to C. The difference is slight, since the C-E
third is tempered only 1 cent wider than F-A.
We used this tuning because it is from the era, it is not any radical
departure from numerous other non restrictive tunings of the time, and
because it is slightly assymetrical. The graphs that accompany the CD
demonstrate a comparison of the thirds, and the thirds in the keys of F, C,
G, D, A, suffer less tempering than the remaining ones. Normal for the well
tempered keyboard and producing quite a sense of color in Mozart.
Our comparison allows several approaches. In the normal tracks of "Six
Degrees" the Prelleur Mozart follows a 1/4 comma Scarlatti piece. In the
separate comparison tracks, that same Prelleur Mozart follows 1/4 comma
Mozart! The physical sensation of tempering becomes readily apparent when
the piece is the same.
I wish it were available now, but anybody that has ever dealt with a record
company knows I can't say when, I am praying by December 1.
Regards,
ED Foote
Nashville, Tn.