LAC-1 Legacy Analog Collection


Operating System 1.2 adds the fifth and sixth synth models for the open architecture OASYS, available together in the new LAC-1 Legacy Analog bundle. The OASYS edition of the Korg Legacy Analog Collection adds the distinctive MS-20EX and the rich-sounding PolysixEX to your audio arsenal. Korg's Component Modeling Technology (CMT) rebuilds the entire original instrument in the digital domain, for a level of authenticity not possible in other systems.

As with all OASYS EXi instruments, these two new synths can be used individually, or blended together in any combination of two instances per Program. So you can make sounds using two of the same synth, or blend together two different analog synths, or even an analog synth with a plucked string or tonewheel organ!

MS-20EX
The MS-20EX is a flexible, semi-modular virtual analog synthesizer. At its heart is a faithful re-creation of the original Korg MS-20, including both its many features and its distinctive, often aggressive timbral signature.

To this core, we added all of the features first introduced in the Korg Legacy MS-20 plug-in, such as the External Modulation routings, tempo synchronization, and the Analog knob, for modeling the inherent instabilities of analog oscillators and filters.

Then, we made significant, OASYS-only modifications to the Patch Panel (shown in red below), inspired by the MS-20's big brother, the MS-50. These enable discrete access to all major components, including both VCOs, the HPF, LPF, VCA, and the ESP's Band Pass Filter, for more powerful patching capabilities.

The Patch Panel itself is also more flexible, with two new mixers for merging and scaling signals, and unlimited "mults," so that each output can be connected to multiple inputs. Like the original MS-20, you can also use a live audio input as both an audio and control source.

Finally, we added AMS modulation for all original MS-20 controls, plus four additional EGs, four additional LFOs, and four AMS mixers. Of course, the MS-20EX has access to all standard EXi Program features, including dual key tracking generators, the Common LFO and Common Step Sequencer, Vector, KARMA, EQ, and effects.

PolysixEX
The PolysixEX is a rich-sounding, easy-to-use virtual analog synth. It also features very high polyphony–up to 172 voices, with room for effects!

When designing the PolysixEX, we started with a faithful reproduction of the features and sonic character of the classic Korg Polysix. These include a VCO and sub-oscillator, pulse-width modulation with a dedicated LFO, a four-pole, self-oscillating resonant lowpass filter, an ADSR envelope, a Modulation Generator (aka LFO), an integrated arpeggiator, and built-in effects.

Next, as with the MS-20EX, we added the features from the Korg Legacy Polysix, including External Modulation routings, tempo synchronization, and the Analog control. Finally, we added AMS modulation for all original Polysix knobs and switches, plus two additional EGs, two additional LFOs, and four AMS mixers.

Of course, the PolysixEX has access to all standard EXi Program features, including dual key tracking generators, the Common LFO and Common Step Sequencer, Vector, KARMA, EQ, and effects.

These additional features open up expressive and timbral possibilities far beyond the original instrument–and yet all of the main synthesis parameters fit onto a single page of the display. Together, these make the PolysixEX a perfect combination of simplicity, great sound, and versatility.

Sounds
Both instruments have been voiced by Korg's acclaimed worldwide team of sound designers, who have taken the best of the current soft synth voicing and adapted them to the OASYS' many additional features, as well as making totally new sounds. Each synth, controller and effect have been cared for to deliver the standard of sound that you've come to expect from Korg, and the OASYS. The KARMA voicing was done by the inventor himself, Stephen Kay, and is a wealth of both fun and inspiration.

Plans are also underway to release all of the Legacy software's MS-20 and Polysix sounds in OASYS format.

What is CMT?
Korg's CMT (Component Modeling Technology) creates virtual instruments that are indistinguishable from the original. CMT takes an organic approach to modeling, reproducing not only the sound but also the character and response curve of each parameter, so that the results are completely faithful to the original model.
CMT's cloning of the entire instrument, based on an intimate knowledge of the original analog circuits, ensures that every nuance is replicated–delivering all the power and subtlety that up until now only true analog synthesis could provide.



Specifications subject to change without notice