Operation Manual

FREE TEMP. 1 :
> note=C + 0.4 c.
note=C# + 0.4 c.
note=D + 0.4 c.
AHLBORN Classical Organs
English Page 35
PRAELUDIUM III - PRAELUDIUM IV/E - User's Manual
CONTROLS BUTTON FUNCTIONS (Finishing)
REMINDER !
1) The TONE TRANSPOSER of the instrument functions only when you insert the normal temperament
EQUAL (Equal A-440). When the historical temperaments or temperaments to edit are in use, the
Transposer is automatically disabled.
2) Historical temperaments and temperaments to edit function only on DIAPASON LA-440. To modify the
diapason, use control ORGAN TUNING, and follow the instructions illustrated in section "Generals" of
this User's Manual.
TEMPERAMENT EDITING (programmable temperaments)
Four temperaments can be edited (follow SYSTEM PANEL N.2); especially sections called:
FREE TEMPERAMENT 1 - 2- 3- 4.
The system used is that of "value ratio in cents" (+ or -) with respect to the normal equal temperament (value
0.0).
Temperament operation is executed on one octave of the keyboard (from C to B) and the values given to
each single note are automatically transmitted in "real time" to the ENTIRE ORGAN. It is strongly advisable to
execute all the acoustic trials using the central octave (C3-B3) of the Great, with the Principal 8' stop, as the
point of reference. This allows an accurate evaluation of the acoustic undulations of the intervals examined to
develop the temperament.
Disable all stops and insert only PRINCIPAL 8' of the Great
1
Follow the instructions illustrated in pages 12-13 of this User's Manual,  SYSTEM PANELS, to come to the chosen
FREE TEMP. and start to edit your temperament (see example on the display);
The value of each note increases or decreases of 1/10 cents (0.1).
2