Oberheim OB-X8, Руководство пользователя

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57 OB-X8 User’s Guide Chapter 3: Page 2 Parameters
35 . Portamento Mode:
This parameter allows for setting one of a variety
of portamento types modes, as found on the OB-8.
• Normal/Linear
• Exponential
• Equal Time
• Bend Up -12.0 – 19.5
Normal/Linear mode functions like the portamento/glide found on most
synthesizers in that the rate is constant, which results in the time of glide
being longer the greater the interval to the new note. This is the only
mode available on the original OB-X and OB-Xa.
Exponential mode allows for note-to-note glide with a curve that is (as
expected) exponential in shape. Notes will glide at the same rate regard-
less of interval. When Portamento speed is at max, time is about 12
seconds, and 12 o’clock on the knob is about 2 seconds. Mutually exclu-
sive with
bend
and
equal time
modes.
In Equal Time mode, portamento is linear, but adjusts time automatically
to be the same regardless of interval. When Portamento speed is at max,
the time is about 2.4 seconds. At 12 o’clock on the knob, the speed is
about 0.4 seconds. Mutually exclusive with
bend
and
exponential
modes.
Portamento Bend mode functions as though the interval that the porta-
mento is moving from is always the same. In use, it becomes more like
a type of envelope modulation of frequency. The amount is relative to
C3, and is in 1/4 steps. For example, to bend up by one octave, press C1.
To bend down one octave, press C5. The parameter range of the bend is
displayed as -12.0 (as in start the bend from 12 semitones below the note
played) to +19.5 (the bend starts 19.5 semitones above), in 0.5 semitone
increments.
36 . Portamento Match:
When this parameter is set to ON, all voices’
portamento times are identical. When set off, each voice glides at a
slightly different speed, emulating the differences in the analog porta-
mento of the OB-X.