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OsTIrus by The Usual Suspects is a Virtual Instrument and a Virtual Effect Audio Plugin for macOS, Windows and Linux. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin, a LV2 Plugin and a CLAP Plugin.
Product
Version
2.2.6
Product
Version
2.2.6
Product
Version
2.2.6
Instrument
Formats
Effect
Formats

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OsTIrus Emulator for Access Virus TI/Snow.

Latest User Reviews

Average user rating of 5.00 from 3 reviews
OsTIrus

Reviewed By viraven8 [all]
March 7th, 2026
Version reviewed: 2.1.4 on Windows

Before Serum there was Massive, and before Massive there was the Access Virus TI.

Pros: Very powerful analog-digital hybrid character with access to Wavetable synthesis and powerful granular/formant shifting wavetable warp modes. The wavetables built in are very spectral sounding and create very nice resonances and basses. The Filter is very warm. The oscillators are very crunchy. The init Saw wave has the signature curved shape and minimal Gibbs attenuation (as per emulation of VA synths). Capable of the signature Super/Hyper saw. There is a huge selection of distortion types, and powerful analog-modeled FX including Tape delay/ Dispersing Phaser/ Plate Reverb/Freq Shifter etc.

Unbelievable that this existed decades before the other synths that are used today.

Cons: Work flow is old school - I really can't stand Modulation Matrix routing in 2026. Otherwise a perfect synth.

I never experienced the Virus TI until this emulator came out, but I now understand the power of the Virus TI. There is a reason why this synth was responsible for most of the Trance and complex synthesis in that era before software synths caught up. Those who have never experienced this era of analog-digital hardware synths finally have the ability to emulate these synths, and the Virus TI is my absolute most recommended of that list.

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OsTIrus

Reviewed By samdaman09 [all]
February 13th, 2026
Version reviewed: 2.1.1 on Windows

Wow! this is simply amazing and was up and running in no time. The Default Trancy 'Skin' is alright but there are much better skins available today designed by some of the most talented creative artists at their DSP563Community on Discord and other places, some with merged tab/pages or one pagers for those talented people who like to create thier own patches.
Hats off to The Usual Suspects team for another amazing precise emulation of a classic. You are very, very much appreciated.

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OsTIrus

Reviewed By Borbolactic [all]
February 7th, 2026
Version reviewed: 2.1 on Windows

Ear-grabbing sounds and presets from the start, in a flexible, multi-engine architecture, faithfully/meticulously-repro'd from a legend hardware synth's own circuit designs. (Softsynths rarely have it so good, despite the prices, hype or market saturation.) And all for a mere donation if you're generous, like The Usual Suspects. Have it straight-up or maybe paired or tripled with an additive resynth and/or physical modeling synth and disappear into the sound and leave the world's problems behind.

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