Oberheim OB 12, Operating Manual

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OB 12 Z-Domain Synthesizer
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FEEDBACK: sets the feedback of the processed signal, meaning how much signal leaving the
algorithm is to be returned to the input.
•
PRE-DELAY: regulates the delay time for activation of the effect. With short delay times you
will obtain a more immediate Chorus; longer Pre-Delay times add an acoustic background
effect to the sound.
•
LEVEL
([LEVEL] with the LED of the [LEVEL/PARAMETER] button off)
: regulates the level of the signal
leaving the Chorus effect.
•
PARAMETER KNOB ASSIGNED TO: defines which of the parameters shown in the video
page can be regulated using the trimmer associated to the Chorus effect (the second from the
left in the EFFECTS) when the LED of the [LEVEL/PARAMETER] key is on.
The DELAY folder can now be selected to display the video page relating to the effect of the same
name. The Delay (or echo) supplies separate repetitions of the signal. If feedback is added, or in
other words if part of the delayed signal (leaving the algorithm) is returned to the effect input, you
can obtain a succession of repetitions, each with a lower dynamic level than the previous ones. A
modulated Delay (i.e. a Delay+Chorus) can also be obtained by means of the MOD. DEPTH and
MOD. RATE parameters.
The programming parameters are the following:
•
STATUS
([CHORUS])
: inserts the Delay effect in the effects chain (INSERTED) or bypasses it
(BYPASSED).
•
TIME: sets the time which passes between one repetition and the next, in a range of values
from a few milliseconds (TIME=0) to 800 msec. (TIME=100).
•
FEEDBACK: sets the quantity of signal to be sent to the delay line input, and thus the repetition
decay time.
•
HI-DAMP: displays the cut-off frequency used by a low-pass filter which eliminates all the
frequencies above that set, from the repetitions of the modulated line. If this parameter is set
with a relatively high value, it is able to re-create the sound of an analog delay or a tape echo,
in which the successive delayed repetitions have a warm, sweet timbre.
•
LEVEL
([LEVEL] with the LED of the [LEVEL/PARAMETER] button off)
: regulates the level of the signal
leaving the Delay effect.
•
MOD. DEPTH
(Modulation Depth)
: regulates the depth of modulation on the delayed signal.
•
MOD. RATE
(Modulation Rate)
: regulates the speed of modulation on the delayed signal.
•
PARAMETER KNOB ASSIGNED TO: defines which of the parameters shown in the video
page can be regulated using the trimmer associated to the Delay effect (the second from the
right in the EFFECTS section) when the LED of the [LEVEL/PARAMETER] key is on.