Kurzweil K2500RS, Руководство музыканта

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Other Editors
The Intonation Table Editor
17-2
value of the intonation key parameter (IntonaKey). This sets the tonic, or reference note for the
parameters on the Intonation Table Editor page. WeÕll explain this below.
Enter the Intonation Table Editor by pressing the Edit button. The Intonation Table Editor page
displays a graphic representation of a C octave, with the low C always representing the tonic.
The values for these parameters indicate the amount of detuning applied to each note relative
to perfectly equal intonation. If you look at the values for the intonation table 1 Equal (as
illustrated below), youÕll see that the value of each parameter is 0. None of the notes is detuned,
so the intervals between each note are exactly the same. Take a minute to look at the values for
some of the other intonation tables, and listen to the effect on the tuning.
The top line of the display gives you the usual reminder of your location. The bottom line labels
the soft buttons for the Intonation Table Editor, which let you perform the usual librarian
functions of naming, saving, and deleting the currently selected intonation table, or dumping it
via SysEx.
Assume for now that the IntonaKey parameter is set to a value of C (which is the default). This
means that each C is the reference point for deÞning the intervals of all the other notes.
LetÕs say you want to create an intonation table that ßats the 5th in each octave. Select the value
on the G note displayed by the Intonation Table Editor, and set its value to a negative numberÑ
for example, -12 cents. This will reduce the interval between the tonic (C, in this case) and the
5th (G, in this case) by 12/100ths of a semitone. All the Gs will remain exactly an octave apart
from each other, but theyÕll be 12 cents ßat from their normal pitches.
Press the Compare (Disk mode) button to hear the difference between the edited table and the
original. Press the
Save soft button to begin the save dialog, where you can rename and save
your edited intonation table.
The changes weÕve discussed here are based on a value of C for the IntonaKey parameter. If you
were to select Master mode and change the value of the IntonaKey parameter, youÕd change the
tonic note that the intonation table uses to deÞne the intervals of the other notes. LetÕs say you
change IntonaKey from C to G. The tonic changes to G, and the intervals in each octave are
deÞned relative to G. The minor 2nd is now G#, the major 2nd is A, and so on. In the example
we gave above, all the Ds would now be 12 cents ßat.
A good reference source for descriptions of various alternative intonations is a book by Scott R.
Wilkinson entitled
Tuning In: Microtonality in Electronic Music , available from the Hal Leonard
Publishing Corporation.
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