KVR Audio

ghostwhistler · Post by **ghostwhistler** » Tue Dec 30, 2025 1:17 pm

There seem to be some modulation controls that the OsTIrus doens't have. Phase modulation for example. Are these unique to Viper?

Vortifex · Post by **Vortifex** » Tue Dec 30, 2025 1:25 pm

Import wavetables.

EvilDragon · Post by **EvilDragon** » Tue Dec 30, 2025 2:25 pm

Phase modulation = Yamaha style FM.

vanerio · Post by **vanerio** » Tue Dec 30, 2025 2:31 pm

I would say that Viper has a very very small CPU consumption, what is really nice.
And of course you don´t legally need the hardware as with OsTirus.

Chris-S · Post by **Chris-S** » Tue Dec 30, 2025 3:02 pm

Viper FX are different (maybe better) compared to Virus FX.

Virus/OsTiRus has a limited delay time.

Chris-S · Post by **Chris-S** » Tue Dec 30, 2025 3:05 pm

And I do like the Viper GUI more.

rasmusklump · Post by **rasmusklump** » Tue Dec 30, 2025 3:46 pm

Yes, I think the gui is better, especially with the snow skin that unfortunately isn't included in the download

Korg Supporter · Post by **Korg Supporter** » Tue Dec 30, 2025 4:00 pm

Viper has a sequencer mode for the arpeggiator and really good shimmer reverb. It's so good that Adam expanded on it for the free Solaris plugin.

osiris · Post by **osiris** » Tue Dec 30, 2025 9:19 pm

Adam's fx for one. There's already been a discussion about people wanting to add things to the emus and apparently it just can't be done for a whole lot of valid reasons.

ghostwhistler · Post by **ghostwhistler** » Wed Dec 31, 2025 12:06 pm

I like the GUI more.

I just don't know what the equivalents are in terms of th emodulation options as I said

Echoes in the Attic · Wed Dec 31, 2025 11:04 pm

I would take it over OsTirus for the low cpu alone. Those emulations cause havoc on the cpu. But also prefer the UI and effects. I just wish it was on Mac so I could actually use it.

sunthief01 · Post by **sunthief01** » Thu Jan 01, 2026 3:49 am

Viper is my preferred method for Virus-style sound design over OsTIrus for all the reasons lusted above.

I was having FOMO for the two TI2 oscillator modes that are not in Viper - grain complex and formant complex - however after trying them out I don't really see many use cases - you can achieve similar results with more flexibility in Icarus if you need complex oscillator effects.

Korg Supporter · Post by **Korg Supporter** » Thu Jan 01, 2026 5:47 am

sunthief01 wrote: Thu Jan 01, 2026 3:49 am Viper is my preferred method for Virus-style sound design over OsTIrus for all the reasons lusted above.

I was having FOMO for the two TI2 oscillator modes that are not in Viper - grain complex and formant complex - however after trying them out I don't really see many use cases - you can achieve similar results with more flexibility in Icarus if you need complex oscillator effects.

And Icarus is going to be even better with the 3.2 update!

rasmusklump · Post by **rasmusklump** » Thu Jan 01, 2026 7:59 am

One more thing viper has is that you can support a great developer with outstanding customer support.

Lbdunequest · Post by **Lbdunequest** » Thu Jan 01, 2026 8:10 am

vanerio wrote: Tue Dec 30, 2025 2:31 pm I would say that Viper has a very very small CPU consumption, what is really nice.
And of course you don´t legally need the hardware as with OsTirus.

Not on Ryzen 7000 series CPU

What can the Viper do that the OsTIrus can't?