Overview
System
OA (Open Architecture) Synthesis System
Keyboard
OASYS 88: 88-key Real Weighted Hammer Action (RH2)
OASYS 76: 76-key synth-action
Tone Generator
Method of Synthesis
Internal: PCM (HD-1 High Definition Synthesizer)
EXi (Expansion Instruments)
Analog Modeling (AL-1 Analog Synthesizer)
Tonewheel organ modeling (CX-3 Tonewheel Organ)
Maximum Polyphony
HD-1: 172 voices (172 oscillators)
AL-1: 84 voices
CX-3: 172 voices

Maximum polyphony depends on the kinds of synthesis engines and the number of effects being used.

OASYS dynamically allocates voices to multiple synthesis engines when they are used simultaneously.
Number of Programs/Combinations/Drumkits
1,664 user memory programs (896 (640 PCM+256EXi) come preloaded)
1,792 user memory combinations (384 come preloaded)
152 user memory drumkit (40 come preloaded)
256 GM Level2 preset programs+ 9 GM Level2 drum preset programs
Preset PCM
314MB (1,505 multisamples, 1,388 drum samples)
Expansion PCM Libraries
313MB (EXs 1 ROM Expansion: 229 multisamples, 1,483 drum samples),
503MB (EXs 2 Concert Grand Piano: 5 stereo multisamples)
Capacity of PCM RAM
500MB
The memory available for RAM samples will change based on the use of Expansion PCM libraries; the total RAM memory capacity will be increased in the near future with a system software upgrade.
Wave Sequences
374 user memory, 150 preload
PCM Program
Advanced Vector Synthesis
Control oscillator volumes, synth parameters, effect parameters via the Vector joystick and the tempo-synced Vector Envelope
Structure
Single: only OSC1, Double: OSC1 and OSC2.
Double mode lets you layer two completely separate synth voices, each with their own velocity-switched oscillator, dual filters, EGs, LFOs, etc.
Oscillators
4 velocity zones per oscillator, with switching, crossfades and layering. Each zone can play mono or stereo Multisamples or Wave Sequences.
Filters
Two multi-mode filters per voice; (low-pass, high-pass, band-pass and band-reject) four-mode filter routings (single, serial, parallel and 24dB mode)
Driver
Per voice non-linear driver and low boost circuit
EQ
Three bands, with sweepable mid
Modulation
Three envelope generators, two LFOs per voice, common LFO, four key tracking generators, AMS (Alternate Modulation Source); modulate a large number of synthesis parameters via LFOs, Envelopes, and real-time controllers. Two AMS Mixers - combine and process AMS sources. Add, multiply, smooth, quantize, and more.
Drumkit
Supports both stereo/ and mono drum samples, four-stage velocity switch/crossfade
EXi Program Common
Advanced Vector Synthesis
Control oscillator volumes and synthesis & effects parameters via the Vector Joystick and the tempo-synchronized Vector Envelope.
Modulation
Common Step Sequencer: 32-step sequencer with smoothing, adjustable step duration, and tempo synchronization. AMS (Alternate Modulation Source); modulate a large number of synthesis paramet

Audio Connections

All inputs and outputs are 24-bit.
Outputs
Main Outputs (L/MONO, R): 1/4" Unbalanced; 1.1k Ohm Stereo; 550 Ohm Mono (L/MONO Only)
Individual 1-8:
Max. output level: less than +18.5dBu (when load impedance is 100k Ohm)
Headphones: 1/4" stereo phone jack, output impedance: 33 Ohm max. level: 72mW (when load impedance is 33 Ohm),
S/P DIF: Optical, 24-bit, IEC60958, EIAJCP-1201, 48kHz or 96kHz
EXB-DI (optional ADAT Output):
ADAT format Output: 24-bit, 48kHz, 8-Channel; BNC Word Clock In
Inputs
Audio Inputs 1 and 2: XLR-1/4" phone combi jacks (balanced), MIC/LINE switches, level control knobs, phantom power switches,
input impedance: 10kOhm,
source impedance: 600Ù
Nominal levels: +4dBu to - 36.5dBu (LINE, level control knob=min. to max.),
-19.5dBu to - 62dBu (MIC, level control knob=min. to max.),
Maximum levels: +16dBu to - 24.5dBu (LINE, level control knob=min. to max.), -7.5dBu to - 50dBu (MIC, level control knob=min. to max.),
Audio Inputs 3 and 4: 1/4" phone jacks (unbalanced), input impedance: 10kOhm;
max. level: +16dBu,
source impedance: 600 ohm
S/P DIF: Optical, 24-bit, IEC60958, EIAJCP-1201, 48kHz or 96kHz
Control Inputs
Damper pedal (half damper supported), assignable switch, assignable pedal
MIDI & USB Interface
MIDI
In, Out, Thru
USB Interface
Four high-speed USB 2.0 A connectors (for external USB devices)
Disk Drives

2.5", 40GB Hard Drive,
CD-R/RW
Size, Weight and Power
Power Consumption
130 Watts
Dimensions
76-key: 49.84" (W) x 19.06" (D) x 5.31" (H)
1,266 (W) x 484 (D) x 135 (H) mm

88-key: 57.40" (W)x 19.06" (D) x 5.31" (H)
1,458 (W) x 484 (D) x 135 (H) mm
Weight
76-key: 56.44 lbs / 25.6 kg.
88-key: 70.99 lbs / 32.2 kg
Accessories & Options
Included Accessories
AC cord,
CD-ROM for data restoration
Options
EXB-DI Digital Interface Board
XVP-10 Expression/Volume Pedal
EXP-2 Foot Controller
DS-1H Damper Pedal
PS-1 Pedal Switch
EXs Expansion Samples: Expansion PCM Libraries
EXi Expansion Instruments: Expansion Instrument Libraries
EXf Expansion Effects: Expansion Effect Libraries

* Sound processed with INFINITY.
* Specifications and features are subject to change without notice.
*ADAT is a registered trademark of Alesis Corp.
*KARMA(R) (Kay Algorithmic Realtime Music Architecture) and the KARMA Logo are registered trademarks representing patented technology from Stephen Kay, Karma Lab LLC, www.karma-lab.com.