Filter
Top Products
Main Features Open Architecture Synthesis Studio
13
Detailed Specifications
• Open Sampling System, with resampling and In-
Track sampling
• 16-bit/48 kHz stereo/mono sampling
• Up to about 1.5GB of PCM RAM, depending upon
the installed RAM and currently loaded EXs
samples; see “Sampling and RAM” on page 119 for
more information
• Maximum of 4,000 samples/1,000 multisamples (up
to 128 indexes per multisample)
• Direct sampling from CD (CD-DA)
• Load AKAI S1000/S3000 data, as well as Korg,
AIFF, and WAVE formats
EXi expansion instruments
EXi expansion instruments allow you to expand the
synthesis capabilities of the OASYS. Some are enabled
from the factory, including the AL-1 Analog Modeling
Synth, the CX-3 Tonewheel Organ, and the STR-1
Plucked String. Others are optional, including the MS-
20EX and PolysixEX.
EXi Programs let you use any two EXi together, and
provide a number of common features, as detailed
below.
Detailed Specifications
In addition to individual EXi features, all EXi Programs
include:
• Advanced Vector Synthesis: Use the vector joystick
and the vector envelope (tempo synchronization
available) to control each oscillator’s volume, synth
parameters, and effect parameters
• Modulation: Common step sequencer, AMS
(Alternate Modulation Source), common LFO, two
key tracking generators
• Three-band EQ (adjustable mid-frequency)
AL-1 Analog Modeling Synthesizer
The first OASYS EXi Expansion Instrument is a state-
of-the-art virtual analog synth engine: the AL-1. Not
content with a mere handful of modeled voices, the
AL-1 delivers an unparalleled 96 notes of polyphony,
capable of sounding an incredible 576 oscillators
(including dual sawtooths and noise generators).
Ultra-low aliasing oscillators
This responsive synth features our distinctive ultra-
low aliasing oscillators that recreate all the power and
glory of true analog synthesis – without the artifacts
that can often plague lesser modeled oscillators. But
that’s just the beginning.
The AL-1 will satisfy all your vintage yearnings - and
your future ones as well. The two main oscillators offer
eight flexible waveforms each, for a wide palette of
modulatable shapes. Other progressive features
include wave-shape morphing, a floor-thumping sub-
oscillator plus a variable-color noise generator capable
of white, pink, red flavors - and beyond.
An adjustable drive parameter provides a distinctive
character to the vintage oscillator modeling; while
sync, FM, low-boost and several varieties of ring
modulation offer plenty of tone-mangling power.
External live audio can even be accessed as an
additional signal source.
Dual multi-mode resonant filters
Each voice can use either one or two of Korg’s
incredibly versatile multimode (Low Pass, Band Pass,
Band Reject [notch], and High Pass) resonant filters.
For maximum flexibility, the filters can be connected in
series or parallel, to generate 12 dB or 24 dB per octave
slopes.
Korg’s new MultiFilter lets you crossfade in real time
between any two of 21 different filter types – including
your own custom mixes of LP, HP, BP, BR and dry
input.
Powerful, solid sounds from the Drive and Low
Boost circuits
Classic vintage analog synthesizers derived some of
their character from distortion that occurred in each
stage of their components. The AL-1 features a Drive
circuit that replicates these classic sounds. You can also
use the drive circuit more aggressively to create
punchy overdriven sounds. There’s also a Low Boost
circuit that lets you control the low-frequency
character of the sound.
High-quality, high-precision, high-function LFOs
The AL-1 provides a common LFO for each timbre and
four LFOs for each voice. If you’re using the maximum
polyphony, this means that an amazing 385 LFOs* are
operating simultaneously.
You can choose from eighteen types of LFO waveform,
and also adjust the phase of the waveform, the curve,
and the center value of the amplitude to create a wide
variety of distinctive modulation. Since the waveform
itself is generated with extremely high precision, you
can create perfectly smooth sweeps. You’ll appreciate
the LFO’s tightness and accuracy not just at high
speeds, but also for low-speed modulation.
It goes without saying that you can also apply key sync
so that the same modulation occurs each time a note is
played, or synchronize the modulation speed to the
tempo to create rhythmical tonal changes.
Ultra-fast ultra-precise envelope generators
The AL-1 provides an ultra-fast ultra-precise envelope
generator (EG). As with the EGs of the PCM synthesis
engine, you can adjust the curve for each stage (attack,
decay, slope, and release), and take advantage of
sophisticated modulation features that go well beyond
conventional EGs, such as the EG Reset feature that
lets you retrigger the EG any number of times between
note-on and note-off.
Step Sequencer
The step sequencer built into the AL-1 can not only
play phrases or rhythms, but also be used as an
extremely sophisticated modulation source. If the
output of the step sequencer is assigned to Pitch, the