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9
Introduction to OASYS
Main Features
Open Architecture Synthesis Studio
The OASYS features the OA (Open Architecture)
synthesis system, which offers all the benefits of a
variable software system backed by the hardware
integrity that can only come from a fully-integrated
instrument design.
Currently, the OASYS includes sophisticated PCM
sample playback including Wave Sequencing and
Vector Synthesis (the HD-1 High Definition
Synthesizer), analog modeling (the AL-1 Analog
Modeling Synthesizer), tonewheel organ modeling
(CX-3 Tonewheel Organ), and physical modeling (the
STR-1 Plucked String).
The optional LAC-1 Legacy Analog Collection adds
two CMT Modeled Analog Synthesizers, the MS-20EX
and PolysixEX, for a wealth of additional timbral
capabilities.
The OASYS ‘s Open Architecture is designed to enable
future options to further expand the instrument’s
capabilities, including additional EXi expansion
instruments, EXs expansion samples, and EXf
expansion effects.
The OA (Open Architecture) synthesis system together
with KARMA, a sixteen track MIDI sequencer and
sixteen track hard disk recorder, a sampler, control
surface, and a keyboard with great response are all tied
together by a high-speed processor into an organic
whole as the OASYS (Open Architecture Synthesis
Studio), the perfect instrument to fuel your musical
creativity.
Detailed Specifications
• Synthesis methods:
HD-1 High Definition Synthesizer
AL-1 (Analog Modeling Synthesizer)
CX-3 (Tonewheel Organ)
STR-1 (Plucked String)
MS-20EX (CMT Modeled Analog Synthesizer)
PolysixEX (CMT Modeled Analog Synthesizer)
Future EXi (Expansion Instruments)
• Maximum polyphony
*1 *2
:
HD-1: 172 voices (172 oscillators)
AL-1: 96 voices
CX-3: 172 voices
STR-1: 48 voices
MS-20EX: 48 voices
PolysixEX: 172 voices
• PCM sampling method: 16-bit, 48 kHz
uncompressed
• Preset PCM: 314 MB (1,505 multisamples, 1,338
drum samples)
• EXs1 ROM Expansion: 313 MB (229 multisamples,
1,483 drum samples)
• EXs2 Concert Grand Piano: 503 MB (10
multisamples)
• PCM RAM: Up to about 1.5GB, depending upon
the installed RAM and currently loaded EXs
samples; see “Sampling and RAM” on page 119 for
more information.
• Wave sequences: 374 user memories, 150 preloaded
*1) The actual maximum polyphony depends on the
oscillator settings for stereo multisamples, velocity
crossfading, wave sequence crossfading, and double
mode.
*2) If multiple synthesis methods are being used
simultaneously, the required number of voices of
polyphony will automatically be allocated by the
system as necessary.
PCM synthesis engine – HD-1 High
Definition Synthesizer
High-capacity PCM sounds, newly designed
oscillator
The HD-1 High Definition synthesizer, which is the
PCM synthesis engine of the OASYS, uses a newly
designed oscillator.
The PCM waveforms are 16-bit 48 kHz uncompressed
data. They include a total of more than 1 Gigabyte of
meticulously-recorded stereo samples and long
samples.
Each voice has oscillators (two oscillators allowing
four-stage velocity switching/crossfading/layering)
that can use up to eight (stereo) multisamples, up to
four filters (two filters each with four modes and four
routings), two amps, five LFOs, and five EGs, all
available simultaneously.
Each voice (oscillator, filter, amp, etc.) provides a
generous array of modulation functions and
parameters, letting you construct intricate and rich
sounds.
The EXs2 Concert Grand Piano extended PCM library
consists of a lavish 503 MB of long stereo samples,
captured for each key at four levels of dynamics. In
addition, the Note-On Control function reproduces the
sympathetic string vibration that occurs when you
hold down the damper pedal. When you hold down
the damper pedal and strike a key, the sympathetically
vibrating strings will also sound, faithfully replicating
the depth and transparency of an acoustic piano.
Staple ensemble sounds such as strings and brass use
stereo sampling to capture their natural spaciousness,
with a rich variety of articulations such as tremolo,