For RCT users only

[Jim Coleman, Sr.]

For CyberTuners Only

Special instructions for tuning 36" Acrosonics

In my opinion if one tunes the temperament section using the 4th
partials, the higher inharmonicity pianos will smooth out better
across the Tenor stringing break. This however will involve using
two sparate tuning records when tuning pianos such as the Baldwin
Acrosonic spinet.

Here is how I proceed:

In Chameleon2 change from the default 3rd partial to the 4th partial
by clicking on the up/dn arrows in the 3rd section of partials.

Sample the 5 A's in the normal manner.

Click on OTS #9 and click on the chameleon Calculate button.

Go back to Chameleon2 and click on OTS #4 and click on Calculate.

This will allow you to tune from G3 (the lowest plain wire) thru C8
using the tuning calculated with OTS 9 for all the plain wire notes.

When tuning from F#3 downward, go back to the OTS 4 program. This
will make a very smooth transition across the break on this piano.
The wound strings will tune like 6-3 type octave matching. There 
will be a couple of 5ths which are narrower than usual, but the 
M3rds will be very well in line and the octaves will sound as good
as can be expected in a piano with this kind of break.

If you don't like to tune the treble as sharp as I do, you could
select a 3rd tuning (OTS #6) for tuning from A4 up thru C8. Or, if
you are really conservative you could use the OTS #4 for the treble
from A4 thru C8.

This general procedure should work well with most pianos which have
a hockey stick like curve in the Tenor bridge where there are wound
strings on that bridge. Use the higher OTS # for the plain strings
and use a much lower OTS for the wound strings. The differences may
need to be less between the two OTSs for some spinets, but it is
rather easy to discover what works best.

Jim Coleman, Sr.