Part of AAS's Session Series, the Ultra Analog Session 2 is announced as "a simple and fun synthesizer". At its core lies a “hard sync” oscillator and filter duo supplemented by a unison aimed at delivering a rich and modern sound. Additionally, key synthesis controls, an arpeggiator, and a multi-effect module complete the package with the promise of "a direct and ludic playing experience".

The factory library contains 144 presets divided into the Arpeggio, Bass, Lead, Pad, and Polysynth categories. Artists, producers, and long-time AAS collaborators Richard Devine and Sean Divine have contributed 50 signature presets each to this collection.

Based on evolutions of the oscillator and filter from the brand's Ultra Analog VA-2 to create a new design, the Ultra Analog Session 2 aims at delivering rich and expressive sounds.

Neat features:

• Standalone operation for quick jams and experimentations
• Real-time control over any parameters via your MIDI controller knobs, faders, and switches
• MIDI clock, tap, and host tempo synchronization for effects and modulations
• Relaxed editing with unlimited undo/redo capability

The benefits of physical modeling:

• Sound manipulation at the source core
• Presets load in a flash
• Super smooth dynamics—no velocity layers!
• Small memory footprint—less than 256 MB of RAM per instance
• Installs in less than a minute—less than 59 MB on disk

Ultra Analog Session 2 runs on both Mac OS X and Windows in 32- and 64-bit host sequencers supporting the VST, Audio Units, RTAS, and AAX Native plug-in formats

Mac minimum system requirements:

• Mac OS X 10.6 or later
• Intel Core processor or later
• 512 MB of RAM
• 70 MB of free hard drive space

PC minimum system requirements:

• Windows XP SP3 32-bit or Vista, 7, 8, or 10 32‑/64‑bit
• Intel Core or equivalent processor
• 512 MB of RAM
• 70 MB of free hard drive space

Available now, it has a regular price set at $49, but until January 15, 2016 it is available at the special introductory price of $39.

More INFO: Applied Acoustics Systems | Ultra Analog Session 2

 

Last edited: Dec 11, 2015

So, what is the Session Series ? A "Ready to Go" Light Version of the original. i've looked at ASS website and didn't see the answer.
(Or it's just my english that is not good enough ...)