OsTIrus Is A FREE Virus Ti Emulator By The Usual Suspects


From the developer Usual Suspects comes their latest release – OsTIrus, a plugin that supports emulation of the Access Virus TI line of synthesizers.

Few synthesizers are as famous as the Virus Ti for trance and other dance genres of the early 2000s to today. The good folks at The Usual Suspects have made waves in the past for the release of Osirus, a Virus A/B/C emulator, and Vavra, a Waldorf microQ emulator.

You can read our article about their Access Virus C emulation to get some background information.

OsTIrus is their latest release, and it targets the Virus Ti, Ti 2, and Snow as you might imagine from the name. I was a donator for early access, so I’m perhaps a bit biased, but I think it’s their best release yet.

OsTIrus features all the functions you’d expect of a hardware Virus Ti. It has six stereo outputs, three analog and three digital.

Polyphony is unlimited, restricted more by the emulated DSP chips and their clock speed rather than any hard restrictions coded into the emulator itself. You can also use sample rates up to 96kHz, which should suit folks who are rather obsessive about aliasing.

You’ve got the full range of features like grain table and formant oscillators, wavetables unique to the hardware synthesizer, and the ever-famous hypersaw.

Unlike the hardware unit, you’re not going to have to rely on MIDI DIN to get the best possible MIDI timing out of the synth. Everything works as intended, and is flawless going by the time I’ve had with it.

Sound-wise, this thing absolutely slays. I’m not one for the trance and dance sort of stuff in my personal works.

However, the Virus Ti is built with ambient pads and smooth Reese basses in mind. Patch management is also a breeze thanks to the patch browser. You can surf presets via categories, banks, or any other criteria you might have in mind.

As with all previous releases, the emulator itself is free. You do have to provide a legally acquired Virus Ti firmware file to make the most of it. However, if you can swing that, you’re in for one of the best softsynths in recent memory.

OsTIrus is available for Windows, Mac, and Linux. The plugin has an instrument and FX version in VST, VST3, AU, and CLAP formats.

If you have the cash to spare, I highly recommend donating to the developers to help fund some exciting new projects that are in the works.

Download: OsTIrus (FREE)


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Liam is a producer, mixing engineer, and compressor aficionado. When not mixing, he can be found pretending to play guitar, as he has been doing for the last 20 years.


    • not mrg i swear


      Children know such a lot now, they soon don’t believe in fairies, and every time a child says, ‘I don’t believe in fairies,’ there is a fairy somewhere that falls down dead. ;-(

      *COUGH* archive.org/details/@hocuspocus345 *COUGH*

      What? I said nothing.

      • Man, this is THE BEST hardware emulation ever, and I have all the sounds. Thank you for that!
        *COUGH*Ultimate Virus TI Soundsets BUNDLE ViRUS TI PATCHES MID*COUGH*

  1. This emulator is SO AWESOME! I ran a multi with eight sounds, numerous efx and arps and it barely registered in my processor monitor…on an old stock 2016 MacBook Pro. I can only imagine what it will do on the newer computers. I own an Virus KC that I swore I’d never sell until I get a Virus TI, now I’m wondering if I need either anymore

    • I’m on Windows 10, i5, with 16GB RAM, using FL Studio. It is not a new computer, but it manages to run more or less all my VST plugs without problems

      With OsTirus I experience a lot of CPU spikes. So maybe Mac is a more viable platform for it ?

      • When I ran the Virus C emulator on the same 2016 Macbook Pro I got all kinds of nasty CPU spikes and such. So far this combined with the new version of Harmony Bloom (released the same day) is a dream machine!

      • “With OsTirus I experience a lot of CPU spikes. So maybe Mac is a more viable platform for it?”

        I’m not going to go to in-depth with any of this, but:
        Neither platform is more viable, it’s all about specs, MIPS in this case (argue the equivalent.) Basically, the spikes are due to how FL Studio handles internally, it’s along the lines of (similar idea, not the same,) how Studio One now handles cores. This issue and its causes and *possible solutions, can be found in many threads over the past ten years in various forums. Ironically, official forums of Image-Line, PreSonus, etc., are historically the least helpful.

        • Thanks for the info, so performance is DAW related

          I will try to load it up using SAVI host, see how that works

        • Putting it in “Snow Mode” makes it eat less CPU and RAM too. You only get 4 channels in that mode, not sure what other restrictions there might be (polyphony probably).

  2. Does anyone have Virus Ti skin? I’ve seen that skin look like exactly the same as og Virus editor exists, but can’t find it anywhere

  3. Go to their discord server and there you’ll find a OsTIrus Skin Repository channel. There is that skin and it’s dark version.

  4. A stupid question, but I’m stuck – how do I add presets to favorites? Dragging doesn’t work, there’s nothing under the right mouse click…

    • It would be stupid not to ask.

      In the browser, right-click “Favourites”, select “Add…”, you can then enter a category name like “Best Pads Evah!!1” in our example. You can now browse the presets and when you find the “Whoa dude, that’s the best pad ever!”, you can drag’n’drop that preset name to the newly created category. Until the next one obviously.

  5. It sounds better than my hardware Virus B.
    WAY better, even on the same presets.
    I can’t believe it…
    Who wants to buy an old used Virus B, anyone? :)

    • Be sure to read the Installation Guide on The Usual Suspects’ website, it’s quite well done and should suffice. The only thing I would add, is when installing the VST3, to keep the whole “OsTIrus.vst3” folder structure intact, do not just copy the vst3 file buried inside. And put the firmware.bin file at the same level of the installed folder, not inside of it. If the plugin opens, you -HAVE- presets, because a lot of them are baked in the firmware.

  6. This seems like a great piece of kit and surprised me by being simple to install. For VST3 on PC, just extract and copy the entire OsTIrus.vst3 folder into your usual VST3 folder (usually in Common Files) and drop the firmware file (once you’ve sourced it) right next to the OsTIrus.vst3 file within that folder. It comes with hundreds of classic presets, so you might not even need to search for other ROM banks. For lovers of old skool techno and house, you could lose hours just auditioning the presets!
    All seems to work well in FL Studio for me.

  7. Hmmm, I’m on a Mac, dragged the plugin and the firmware.bin into the Components folder, opened Logic, but it is still asking for the ROM file. Did I miss a step somewhere? Thanks.

    • The factory presets here under the Browser tab of the plugin. If you want/need more/different sounds I can give you two legal sources of free soundsets: Audiobombs and PresetPatch.
      This should be enough to spend a few nights.

    • Whut? If you’re reading this, two things: There was an update, maybe it’ll fix your problem. If you still have problems, either go to the official Discord server and/or read the guides on the official website. Alternatively, maybe someone here or some audio/plugin forum could answer.
      Just don’t give up that easily.

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