Setting The Keyboard; Portamento; Unison; Mono - Oberheim OB 12 Operating Manual

OB 12
This section of the panel allows you to regulate the
transposition of the oscillators and the keyboard modes.
The section contains the following controls, which as the
illustration shows are subdivided into four subsections.

PORTAMENTO

When the Portamento is active, the pitch (tuning) of each
new note played is not reached instantaneously and
separately, but by means of a gradual shift of definable
duration.
[TIME]: sets the Portamento time, meaning the time the pitch
takes to change (between the two notes). Turn the trimmer
clockwise to increase the Portamento time.
[PORTAMENTO]: use this button to enable / disable the
Portamento status, following the usual logic:
LED on: function active
-
LED off: function disabled
-

UNISON

The UNISON function allows you to play three voices simultaneously by pressing one key on the
keyboard, enriching the sound and giving it more body. When this function is used, the polyphony
will be reduced to 4 notes.
[UNISON]: activates and disables the Unison function following the rule:
LED on: function active
-
LED off: function disabled
-

MONO

This subsection allows you to set the keyboard mode, i.e. polyphonic or monophonic. If the
monophonic keyboard is used, the Legato function will also be available.
Using a polyphonic keyboard allows more than one note to be played at once, 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).
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