Korg OASYS
The Korg OASYS is a workstation synthesizer released in early 2005, 1 year after the successful Korg Triton Extreme. Unlike the Triton series, the OASYS uses a custom Linux operating system that was designed to be arbitrarily expandable via software updates, with its functionality limited only by the PC-like hardware.
OASYS was a software implementation of the research project that ultimately resulted in the OASYS PCI, a DSP card which offered multiple synthesis engines. The original OASYS keyboard concept had to be scrapped because of excessive production costs and limitations of then-current technology.
Production of the OASYS was officially discontinued in April 2009. Korg sold just over 3000 units worldwide. The final software update was released on November 24, 2009.
In 2011, Korg Kronos, a successor of Korg OASYS, was introduced at that year's NAMM Show.
Features
The standard Oasys comes with hardware similar to many personal computers:- 2.8 GHz Pentium 4 CPU
- 40GB hard disk drive
- 1GB DDR RAM, user-expandable to 2GB
- 10.4" LCD touch screen
Options
EXB-DIThe optional EXB-DI adds 8 channels of ADAT Optical format 24-bit 48 kHz digital output, as well as a word clock input.
The EXB-DI was first made available for the Korg Triton Studio keyboard and Triton Rack module - on these units only 6 outputs are available via ADAT.
Bar a few early models of the Oasys, the EXB-DI is user installable.
Synthesis engines
As of November 24, 2009 the latest version of the OASYS OS is 1.3.3a, featuring the following synthesis engines:- HD-1: A PCM synthesizer, with 628 MB of preloaded samples and Wave Sequencing.
- EXs: A sample library that works by itself or with other engines. EXs-1 is a set of instruments and EXs-2 is a grand piano.
- AL-1: A 96-note polyphonic virtual analog synthesizer
- CX-3: A modeled tonewheel organ based on the current CX-3
- STR-1: A plucked string physical model
- LAC-1: Optional bundle including two virtual analog synthesizers, the PolysixEX and MS-20EX, which are updated models of the vintage Korg Polysix and Korg MS20. The LAC-1 is available as a free upgrade, but has to be requested by the current owner of the OASYS from Korg.
- MOD-7: Optional that Combines Variable Phase Modulation, waveshaping, ring modulation, PCM sample playback, and subtractive synthesis in a patchable, semi-modular synthesizer. The MOD-7 is available as a free upgrade, but has to be requested by the current owner of the OASYS from Korg.
HD-1
HD-1 Program
The HD-1 is a sample+synthesis engine with a two "oscillator" structure. In addition to the two "oscillators," an HD-1 Program contains a Vector Envelope, Common LFO, two common key tracking generators, KARMA settings, and effects.HD-1 Oscillator
Each "oscillator" consists of a sample playback oscillator, dual multimode filter, nonlinear "drive" and low boost section, amp, and pan. The sample playback oscillator has four velocity zones, each of which can play a mono or stereo sample or a Wave Sequence. Velocity zones can overlap or crossfade. Korg claims very low aliasing distortion, due to the use of band limited interpolation.Wave Sequencing
Wave Sequences were first introduced on Korg's Wavestation synthesizer, released in 1990. Wave Sequences allow a single note to play through a list of samples, one after the other, with or without crossfades, with other associated parameters changing for each sample, as listed below. This can create smooth, evolving timbres, or rhythmic effects. Internally, Wave Sequences are implemented by using two voices; voice A plays the first sample, voice B plays the second sample, voice A plays the third sample, and so on. Other synthesizers have featured concepts which are similar in some aspects, such as PPG, Waldorf, and Access Virus wavetables, Synclavier resynthesis, and Ensoniq Transwaves and Hyperwaves.In the lists below, features new to the OASYS are noted.
OASYS Wave Sequences include, for each step:
- The sample to play
- Sample start offset
- Reverse on/off
- The length of the step, in milliseconds or rhythmic value
- The crossfade time into the next step, in milliseconds
- Crossfade fade-in shape
- Crossfade fade-out shape
- Volume
- Transpose and fine-tune
- Two modulation value outputs, to control any assignable parameters of the synthesizer in the rest of the Program
- Time/Tempo mode
- Run on/off
- Key sync on/off
- Swing and swing resolution
- Quantize Triggers on/off
- Start step and start step modulation
- End step
- Loop start, end, and direction
- Loop repeats
- Note-on advance
- Position modulation
- Duration modulation
Differences from the Wavestation
EXs
EXs is a Korg acronym for "EXpansion Sample". They are sample sounds that come pre-loaded with OASYS. EXs-1 is a sample library with acoustic instruments including guitars, brass, piano, strings, beside others. EXs-2 is a grand piano sampled in each key with 4 velocity levels plus damper. The 1G RAM of OASYS only permits to load 1 EXs at a time, but the user can expand it to have both working at the same time.EXs3
EXs3 includes over 700 MB of brass and woodwind samples, perfect for orchestral and pop productions. Recorded using world-class instruments and players, the collection features piccolo, flute, alto flute, clarinet, bass clarinet, oboe, English horn, bassoon, contrabassoon, soprano sax, alto sax, tenor sax, baritone sax, trumpet, piccolo trumpet, cornet, flugelhorn, trombone, French horn, bass tuba, contrabass tuba, dual-trumpets, dual-trombones, and brass ensemble. Designed to be richly expressive, the samples include multiple dynamics, straight and vibrato versions, breathy and overblown tones, legato, staccato, trills, flutter, growl, sforzando, glissando up/down, falls, doits, voice, breath, attack elements, grace notes, and key noise elements. 128 Programs and 64 Combinations take full advantage of the new sounds.EXi
EXi is a Korg acronym for "EXpansion Instrument". It refers to all OASYS synth models other than the HD-1, including the AL-1, CX-3, etc.EXi Program
This is the Program structure for playing EXi. It is similar to that of the HD-1, but differs slightly in a few ways, such as:- Allows selection of any two EXi for layering or splitting
- Adds a "Common" step sequencer, shared by all voices in the Program
- Adds audio input selection for each of the two EXi
- Adds transposition for each EXi
AL-1
- Two main oscillators with analog-style FM and sync
- * Korg claims proprietary anti-aliasing technology, for no audible aliasing over standard 88-note range, with sync
- * Waveforms: Saw, Pulse, Saw/Pulse, Double Saw, Detuned Saw 1, Detuned Saw 2, Triangle, Square/Triangle
- * Wave Morph and Pulse Width/Phase/Detune
- Sub-oscillator
- Audio input
- Noise generator with saturation and dedicated filter
- Ring modulation
- Mixer provides modulatable volume and filter A/B pan for osc 1, osc 2, sub osc/audio input, noise generator, and ring mod
- Per-voice, modulatable Drive and Low Boost
- Dual resonant multimode filters, including "multifilter"
- * Multifilter provides two separate sets of gain controls for LB, HP, BP, and dry signals, with modulatable crossfade between the two sets
- 4 EGs
- 4 LFOs
- 2 "AMS Mixers"
- Per-voice step sequencer
CX-3
This organ mimics and in many ways enhances the sound of the Hammond organ and Leslie speaker with amplifier simulation and other enhancements.
STR-1
A plucked string physical model that allows you to pluck, strike, scrape, or otherwise "excite" the string with 16 different "pluck" types, noise, or any of the onboard or RAM-based PCM waveforms.LAC-1
The optional LAC-1 Legacy Analog Collection EXi adds the MS-20EX and PolysixEX virtual analog synthesizers.- MS-20EX Runs in demo mode until activated.
- PolysixEX Runs in demo mode until activated.
MOD-7
Note: The MOD-7 and PolysixEX/MS-20EX plug-ins are only available from www.korguser.net. Owners must register their Oasys at the site in order to purchase them. This includes providing the Public ID and serial numbers of their unit.
Notable users
- Kurt Ader
- Rick Wakeman – Live in Hampton Court Palace 2009
- Pete Townshend – The Who
- Keith Emerson – Emerson, Lake & Palmer, Keith Emerson Band
- Tony Banks – during live performances with Genesis
- Greg Phillinganes – session keyboardist, played with Toto 2005–08
- Herbie Hancock
- Paul Davis – it was the last synthesizer he purchased before his death in 2008
- Chuck Leavell – The Rolling Stones
- Sly Stone
- Michael Cretu – Enigma
- John Paul Jones – at 2007 reunion of Led Zeppelin and occasionally with Them Crooked Vultures
- Murray Gold – Doctor Who composer
- Vangelis
- Techmaster_P.E.B.
- Ivan Flack, GBT Music, N. Ireland
- Kenan Imamovic, NOBS,Bosnia and Herzegovina
- Enes Mujic,Berin Buturovic Band,Grivici,Bosnia and Herzegovina