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Synth (Analogue / Subtractive) Plugin by Adam Szabo

Viper has an average user rating of 4.50 from 6 reviews

Rate & Review Viper

User Reviews by KVR Members for Viper

Reviewed By VELLTONE MUSIC [read all by] on October 14th, 2022
Version reviewed: 1 on Windows.
Last edited by VELLTONE MUSIC on 14th October 2022.

For years Virus TI was a dream synth for me, then Viper came out, that dream become reality :)It's versatile EDM synth, i like to combine it with Sylenth, V-Station and Synth1 in EDM projects.

Sylenth1 and Serum have better filters imho, but Viper have interesting ditry sound.

Two complains - superior attitude of the developer to fellow designers and better skin will be more inspirational for users.Cheers.

Reviewed By trusampler [read all by] on October 13th, 2022
Version reviewed: v 1.1.0 on Windows

Owning a Virus TI2 and Viper, I can fully appreciate what Adam made here, and it just makes me smile, each time I play it. I know for a fact that this sounds like a Virus TI, ever since Adam added support for TI Bank import, it's been wonderful loading them up in Viper and being able to use the Virus sounds the way I always wanted to, without all the shortcomings the hardware offers.

I look forward with each release Adam brings out, as it keeps getting better and making the hardware irrelevant. Thanks Adam.

Reviewed By eyezermusic [read all by] on August 4th, 2018
Version reviewed: 1.0.3 on Windows

Great synth. Viper clearly emulates hardware (the Virus TI and possibly Virus C) very well, way better than my expectations. I have a weakness for pads and supersaws. With Viper you can make really phat supersaws and pads, by far better than any other soft synth I've tried (and I've tried many...). You can make all kinds of sounds with Viper of course but the two mentioned sounds are in my opinion what makes Viper stand out.

However Viper only gets 4 stars out of 5 from me because there are a few things that are less good with Viper. It's a slower soft synth, particularly loading it up and browsing the presets (the rest functions well). Despite the measurements taken to optimize CPU and the fact that I have a pretty powerful PC, I still get CPU spikes after running a couple of Viper instances in a project. This can of course be bypassed through bouncing, which is what I recommend doing if you plan on using many instances. These mentioned things makes the workflow less comfortable though. Overall, I'd say sound wise it's 10/10. Performance wise 4/5. The GUI is very good and easy to understand because it's well organized. The only thing a little bit confusing with the GUI at times is at the filter section with the F, M and A buttons. The one you click on will get darker and the one not in use is lighter. I personally think it would have been less confusing if it was the opposite. But maybe it's just me :P.

Reviewed By LL Cool Whip [read all by] on June 4th, 2018
Version reviewed: 1.02 on Windows.
Last edited by LL Cool Whip on 4th June 2018.

Been waiting for the 64 to hit. Snapped it up after confirming some functionality with Studio One 4. Works as expected.

This VST from Adam has a wide, and deep (gene) code pool.

I also think Viper can be used as an example of a very elegantly designed GUI. It's all there and flows very well.

Now I just need to find more time .

Reviewed By moonchunk [read all by] on June 2nd, 2018
Version reviewed: 1.02 on Windows.
Last edited by moonchunk on 2nd June 2018.

Its June 2, 2018 and Viper was just released in 64-bit. For someone like me that has dozens of VST synths, I occasionally spend money on something that ends up being little more than a waste of time and added clutter on my machine.


This synth has unusual sonic characteristics and an unusual response to tweaking that makes this baby stand out as a great addition - even for those who own Spire. The approach is just different enough, and the arp in particular is amazing.

Plus, many of the sounds are really extraordinary and so easily tweaked to get them working in new directions.

You really couldn't ask for a more powerful argument that hardware synths had that special sauce in them - and that's what makes VIPER occupy a unique position - it emulates THAT.

So I was waiting to review VIPER because as a 32-bit plugin it was still common to overwhelm my CPU with it when using a lot of voices and so on.

The 64-bit version comes through - and noticeably overcomes that issue.

Also, this version has a whole new bank of presets.

Thank you ADAM.

One senses this has been a labour of love. Not unlike what the guys at U-he or Reveal Sound would do if they dug back in from scratch with what they'd learned as machines and their processors have become more capable.

Reviewed By ubailey [read all by] on January 29th, 2018
Version reviewed: 1.0 on Windows

I downloaded the demo just to play with the features. I ended up being totally blew back to the point I ended up buying the synth the very next day after sound testing it for about an hour.Easy/nice looking interface and easy to navigate. I love the two filters, but what impressed me the most was the arepeggiator. I cross compaired the arp function in viper to the one in dune 2, and viper by far won this battle as the arp is very powerful with many presets and customizable options. The arp unit makes it very easy to come up with a new song concept in seconds at the push of a button It has some very nice factory presets, that do not sound like other synths out their, and I just discovered a whole second bank of patches to use, which means it comes with 256 patches altogether. The matrix functionality is awesome as well, and the effects section is also very powerful with some filter options including a vocoder filter. this hyas easily become my number 1 synth to go along with dune 2 and serum. This synth is a monster. Many people seem to be thrown off by the 32-bit version. Apparently many daws out their make it difficult to use 32-bit programs, but that wasnt an option for me at all, as my 64-bit version of fl is compatible with 32-bit sw without needing any extra plugins. So, for those who choose not to buy it for that reason, only makes me happier, as I know there will be less people out their with the same sound I have. If you like the access virus, then this is a way cheaper option to get the same sound from a brand new synth. This will be one of the top synths of 2018.

Latest 6 reviews from a total of 6

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