5.4 OVERDRIVE
67
The original electromagnetic organs were equipped with an internal spring reverb system,
so the signal amplified by the rotary tone cabinet was already complete with reverb. By
means of the parameter described above, the OB-5 allows emulation of this feature (if the
parameter is set as
Rev~Rot
), or selection of a setup in which the signal obtains its
reverb from the environment, after it has been emitted by the rotary tone cabinet (if the
parameter is set as
Rot~Rev
).
When the [EFFECTS] button is pressed to move on to the next page, the display will
show:
In this video page the OB5 gives you the option of adjusting the two operating speeds of
the rotary tone cabinet, i.e. the low speed using the
Slow
parameter and the high speed
by means of the
Fast
parameter.
In addition, you can set the transitions between the two speeds; the
S~F
(Slow speed to
Fast speed) parameter regulates the time for the passage from low to high speed (Rise
Time), while
F~S
(Fast speed to Slow speed) regulates the time for passage from the
high to low speed (Fall Time).
This effect simulates the signal distortion which occurred when the valve amplifier
connected to an electromagnetic organ reached saturation. This distortion was very
common in the ‘70s thanks to the first rock-bands and it is still used by those wishing to
perform rock songs with electromagnetic organ sounds.
The [OVERDRIVE] trimmer on the panel on the left of the manuals allows you to regulate
the amount of distortion desired.
