Oberheim OB 12 Operating Manual - page 27

OB   12

Z-Domain Synthesizer

147

The parameters is:

-

Sawtooth wave: modification of the SPREAD parameter

-

Triangular wave: modification of the WRAP parameter

-

Square wave: modification of the WIDTH parameter

these parameters assume the following functions:

SPREAD: Defines the degree of deformation of the sawtooth waveform. If the parameter is

set with values above zero, the sound will be slightly out of tune; this effect will increase as

the value becomes higher.

WRAP: Defines the degree of deformation of the triangular waveform. In this case, the greater

the deformation, the more overtones are added to the sound generated by the signal.

WIDTH: sets the pulse width of the waveform. The trimmer can be turned to the minimum or

maximum setting to enrich the harmonic spectrum of the sound.

•

[FM] 

(Frequency Modulation)

: defines the depth of the frequency modulation of the signal generated

by Osc.1 by the signal originating from the second oscillator. As the knob is turned clockwise,

the modulation depth increases. The resulting sound will be rich in overtones, suitable for

metallic timbres and sound effects.

In addition, you can obtain changes in tone without changing the pitch of Osc.1 by adjusting

the [FINE] and [RANGE] trimmers of the OSCILLATOR 2 section.

If the modulation is not noticeable enough, lower the slider [OSC1

ð

OSC2] of the OSCILLATOR

COMMON section.