Oberheim OB 12, Руководство по эксплуатации

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OB 12 Z-Domain Synthesizer
185
•
MODE
([MONO] and [LEGATO])
: this
parameter can be used to set the
keyboard as polyphonic, by setting the
parameter as POLY, or monophonic, by
setting it as MONO. The Legato function
can also be used by selecting the
LEGATO option (in this case, MONO
mode will also automatically be selected).
Using a polyphonic keyboard allows more
than one note to be played at once (up to
12 in standard conditions of use) while if
the keyboard is monophonic you will not
be able to play more than one note at the
same moment; this may cause problems
on some occasions, but at other times it
may be useful, for example when playing
the timbres of wind instruments, or “old”
analog synthesizers (which had polyphony of one note – i.e. they were monophonic).
The Legato function, only available with monophonic keyboard, allows a succession of notes
to be played without interruption. This means the attack on the following note is eliminated
and only the pitch is changed.
The diagrams which follow illustrate operation of the Legato:
•
MONO PRIORITY: defines the priority for selection of the note to be played in mono mode.
When a note has priority, it means that those played before or after it will not be performed by
the instrument. When the TIME option is selected, the note played will be the one associated
to the key pressed last; with HIKEY set, the note taking priority over the others will be the
highest, while if LOWKEY is set the lowest note takes priority.
•
VOICE RESERVE: sets the minimum number of voices the instrument must play for the part
considered. The OB-12 automatically adapts its maximum polyphony to the complexity of the
timbre and what is being performed on the keyboard. This means that certain notes may be
eliminated from the performance. This parameter allows the user to inform the instrument of
the minimum number of voices which must always be performed, at the expense of what is
being performed with other Parts.
If the UNISON folder is now selected, it will be possible to display the parameters relating to the
function of the same name. This function allows the timbre to be played at the chosen moment as
if three (identical) timbres were really active simultaneously, giving a sound with more body. In this
case, the polyphony will be reduced by one third, since the instrument is generating three timbres
simultaneously instead of one. You can also set the timbres out of tune with each to make the
sound even deeper and more complex.
•
STATUS
([UNISON])
: activates (ON) or deactivates (OFF) the Unison function.
•
DETUNE COARSE: specifies the detuning in semitones in relation to the original pitch of two
timbres. This will provide one timbre with standard pitch, another transposed downward by
the value set, and the third transposed by the same value, but upward.