Hammond SK Pro-73 73-Key Portable Keyboard/Organ - Manual (Page 53)

53
Turn On And Play
O S C I L L AT O R T Y P E S A N D
CHARACTERISTICS
The SK PRO has 6 audio oscillator settings which can be
manipulated to produce a wide variety of tones. These are
explained starting below.
Duo
OSC1
OSC2
Th is setting utilizes two diff erent pitched Oscillators. OSC1
sounds at “true pitch,” while OSC2 can be transposed up or
down by one (1) octave in half-step increments. If the OSC2
LEVEL is set to “0,” only OSC1 will sound.
Th
is Oscillator type is useful for Bass, Lead and “chord” eff ects.
Parameter Control Description
OSC2 PITCH PITCH Shift the OSC2 pitch (-12 ~ 0 ~ +12 by semitones)
OSC2 VOLUME DEPTH Volume of the OSC2 (0 ~ 127)
OSC1 WAVE [TYPE] +
PITCH Waveform of the OSC1 (Sawtooth, Square, Saw+Sqr)
OSC2 WAVE [TYPE] +
DEPTH Waveform of the OSC2 (same as above)
Unison
OSCs
Th is setting utilizes from one to seven Oscillators, one of which
can be detuned against the other. It can be used for celeste,
chorus, or other purposely “out-of-tune” eff ects.
Parameter Control Description
DETUNE PITCH Detune depth (0 ~ 127)
NUMBER DEPTH Numbers of Oscillators (1 ~ 7)
OSC1 WAVE [TYPE] +
PITCH Waveform of the OSC1 (Sawtooth, Square, Saw+Sqr)
UNISON
WAVE [TYPE] +
DEPTH Waveform of the OSC2 (same as above)
Pulse
OSC
A Pulse (or rectangular) waveform has a variable width known
as the “duty cycle.” Th
e sound can be modifi ed by changing the
pulse width or duty cycle. For example, a duty cycle of 50% will
produce a clarinet-like sound while a duty cycle of 6% will yield
a bright, brass-like tone quality.
Parameter Control Description
PULSE WIDTH PITCH Pulse Width (0 ~ 127 as 50 ~ 90 [%])
MOD DEPTH DEPTH Depth of the Pulse Width Modulation (0 ~ 127)
MOD SOURCE [TYPE] +
DEPTH Modulating source (Pitch EG, LFO, Note)
Sync
OSC1
OSC2
Th is setting utilizes two Oscillators which synchronize against
each other to produce overtone eff ects.
Parameter Control Description
OSC1 PITCH PITCH Detune depth of the OSC1 (0 ~ 127)
MOD DEPTH DEPTH Modulation depth of the OSC1 (0 ~ 127)
MOD
SOURCE [TYPE] +
DEPTH Modulating source (Pitch EG, LFO, Note)
FM
OSC1 OSC2
Th is setting utilizes two Oscillators or “operators.” OSC1 is
is the “carrier tone” and OSC2 is the “modulating tone. You
can use this to create both “harmonic” and “inharmonic” tonal
eff ects.
Adjusting the OSC2 pitch
down ctreates wind-instrument
sounds such as fl ute, brass,etc., while adjust the OSC2 pitch up
is suitable for bell-like or “metallic” tones.
Setting the FB (feedback) at “Half ” allows you to create string-
type tones while “Full” is useful for unpitched or “noisy” tones.
Parameter Control Description
OSC2 PITCH PITCH Multiply of the OSC2 (0.5, 1 ~ 16)
MOD DEPTH DEPTH Modulation depth OSC2 to OSC1 (0 ~ 127)
FEEDBACK [TYPE] +
DEPTH Feedback Level (Off , Half, Full)
Noise
OSC
Th is setting creates unpitched sounds or “noise.” Th e sound
changes from “noise” to “random pitched tones” by controlling
the sampling rate.
A high sampling rate creates “seashore” type eff ects, a slightly
lower rate yields a “noisy percussion,” and a still lower rate creates
eff cts suggestive of a “retro sience fi ction movie.”
Parameter Control Description
SMPL FREQ PITCH Sampling Rate (0 ~ 127)
MOD DEPTH DEPTH Modulation depth to the sampling rate (0 ~ 127)
NOISE TYPE [TYPE] +
PITCH Noise color (Red, Pink, White)
MOD
SOURCE [TYPE] +
DEPTH Modulating source (Pitch EG, LFO, Note)