24
RK-100S parameter guide
LFO1, LFO2
Each timbre contains two LFOs. An LFO produces a cyclic change that can be
used to modulate the pitch, tone, or volume of the sound.
Note:
LFO1 and LFO2 can be used as Virtual Patch sources to apply modulation
to a variety of parameters. See page 25.
LFO (Low Frequency Oscillator)
The LFO (Low Frequency Oscillator) is an oscillator that produces a relatively
slow (low-frequency) oscillation, and is used to apply cyclic modulation to various
aspects of the sound. Some typical ways to use the LFO are vibrato (use LFO to
raise and lower the pitch), wah (use LFO to raise and lower the cuto frequency),
and tremolo (use LFO to raise and lower the volume). You can select the LFO as
a Virtual Patch source, select the desired parameter as the destination, and apply
modulation to produce various eects.
The RK-100S provides special parameters that can be modulated from an LFO.
If the OSC1 “OSC MOD” parameter is set to WAVEFORM, LFO1 will be able to
modulate the “LFO1 MOD” parameter, and LFO2 will be able to modulate the
PITCH “VIBRATO INTENSITY” parameter.
WAVE (LFO1) [Saw, Square, Triangle, S&H, Random]
WAVE (LFO2) [Saw, Square+, Sine, S&H, Random]
Selects the LFO waveform.
Amplitude changes irregularly
(Sample & Hold)
Triangle
Sine
Saw
Square
Square+
S&H
KEY SYNC [O, Timbre, Voice]
Species how the LFO will be applied to a voice when note-on occurs.
O: The LFO phase will not be reset when note-on occurs.
Timbre: The phase of the LFO will be reset by the rst note-on that occurs from a
condition of no keys being held; it will not be reset for subsequently played voices.
Note all o
Voice: The LFO phase will be reset at each note-on, and modulation of diering
phases will apply to each voice.
Note on
BPM SYNC [O, On]
Species whether the LFO cycle will be synchronized to the internal tempo or
to an external MIDI Clock.
O: The LFO will not be synchronized. It will operate at the frequency specied
by the “FREQ” parameter.
On: The LFO will be synchronized to the TAP buon or to MIDI Clock messages
from an external device.
Note: “BPM SYNC” is On, selecting LFO1 FREQ or LFO2 FREQ as “DESTINA-
TION” in PATCH 1–5 will have no eect.
FREQ (Frequency) [0.01...100.0Hz]
Species the frequency of the LFO. Increasing this value will result in a faster
frequency.
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