12ths tuning

[Richard Brekne]

Thanks Jim for the encouraging words.  You have given me lots of good
advice and hints about places to look for info and in general all sorts
of help these past few years, and perhaps just a few lights are going on
as a result. Great fun indeed to learn some new things about what we can
do with tunings. Thanks muchly for being you.

RicB

I just posted another generic file for this tuning, with a stretched
bass as an example of how you can use 12th types to manipulate the
stretch.  I get the feeling that 12ths and their types could in the end
be just as easily employed as Octave types (if not more easily as there
are only 3 relevant types) to set the curve of a tunning. Also, holding
one interval type essentialy beatless over such a large range of the
piano simplifies things greatly. In anycase... it will be fun and
instructive to see just how much I can refine the tuning. I hope some of
you try out the idea and contribute with your thoughts and ideas as to
that refinement.

Cheers

RicB


"Jim Coleman, Sr." wrote:

> Hi Richard:
>
> Yes I did tune my Stn L with your program. Even though it was not
> tailor made for my piano, it sounded reasonably well. I really
> like it in the midrange section. In the high treble I like to
> spread the octaves a little more than the 12ths system provides.
>
> I viewed the curves which were a result of the program. Very smooth.
> As you said, it leaves the Bass a little tight. I would suggest
> that while tuning downward into the the Bass, you could for
> example: set TLab to B3 (previously tuned) and tune B2 to stop the
> blocks. This will give you perfect 6:3 type octaves. If you decide
> lower in the Bass to go to 8:4 type octaves at G#1, you could set
> the Tlab to C#3 (whose 3rd partial is G#4) and play G#2. If the
> blocks are moving, use the cents altering keys to stop the blocks,
> then tune the G#1 to stop the blocks. This would give you perfect
> 8-4 type octaves. Keep going down by half steps until you get to
> D#1 where it is even simpler: Set the Tlab to G#1 (its 6th partial),
> Play D#2 and stop blocks with cents keys, then Tune D#1 to stop
> blocks. You can carry this on down to A0. I do something similar
> to this with the SAT on medium to large grands, but it is a little
> easier since the entire Bass uses 6th partials to tune by.
>
> The instructions given above only work on Tunelab97
>
> One of the neat things your 12ths tuning does is spread the octaves
> a little more in octave 5 than most other tunings do. When I tune
> aurally in ET I like to get to pure 12ths just as soon as I can
> coming up out of the temperament area. Then higher up, I compromise
> between 12ths and 19ths. Pure 19ths give too much stretch until
> you get into the top octave where it really helps to maintain pure
> triple octaves. By using pure 12ths in the middle of the piano,
> there is not as much discrepancy between 2:1, 4:1 and 8:1 octaves
> in the top octave and a half. Congratulations on a great idea.
>
> Jim Coleman, Sr.




--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html