Dave Smith Instruments PROPHET 12 KEYBOARD - Manual (Page 22)

12 Oscillators Dave Smith Instruments
Oscillators
The Prophet 12 has four oscillators for each of its twelve voices. The
oscillators are capable of generating the “classic” analog wave shapes—
sine, triangle, sawtooth, square—as well as more complex shapes and
different types of noise.
Use the four oscillator buttons to select an oscillator for editing. The
mysterious ring that connects the buttons is not a life preserver. It’s a
graphic representation showing which oscillator affects another when
the Sync, FM (frequency modulation), or AM (amplitude modulation)
parameters are used. Oscillator 2 affects oscillator 1, oscillator 3 affects
oscillator 2, and so on. For information about what the Sync, FM, and
AM parameters do, see the relevant items later in this section.
Tip: Press and briefly hold any of the oscillator select buttons to light
all four buttons and edit a parameter on all oscillators simultaneously.
Or use the soft knobs to edit the same parameter for each oscillator
individually. Press any oscillator button to exit.
Shape/Noise: Off, Sawtooth, Pulse, Triangle, Sine, Tines, Mellow,
Church, Muted, Nasal, Boing, Gothic, Ahhh, Shrill, Ohhhh, Buzzzz, Meh,
Red Noise, White Noise, Violet Noise— Used to select the wave shape or
type of noise generated by the selected oscillator. Wave shapes include
four typical analog synthesizer waves as well as twelve more complex
wavetable sounds. There are also three types of noise: red, white, and
violet.
Shape Mod/Pulse Width: -64…0…63 —Causes the wave shape to be
altered. How it changes depends upon the selected shape. A setting of 0
is the default, unaffected shape.
When Sawtooth is the selected shape, s
haPe
m
oD
/P
Ulse
w
iDth
controls
the symmetry of the wave, similar to pulse width on the Pulse wave.
s
haPe
m
oD
/P
Ulse
w
iDth
affeccts the pulse width or duty cycle of the
Pulse wave.
0
Pulse Width
-64 63