Viral is a modified version of the open-source Vital synthesizer by Matt Tytel. Not affiliated with or endorsed by Vital Audio.

caviio.

A synthesizer by Caviio

viral.

Your sounds. New possibilities.
Try the Early Access Demo.

Early Access Demo
Viral Effects view showing Phaser 2, Equalizer, Transform, Distortion and Chorus 2 alongside cyan envelopes and LFOs.
01 / EFFECTS — Inside the effects section

Viral / Early Access Demo

Try Viral.
Shape what comes next.

An early access demo of Viral for macOS. This is a development build, so features and behaviour may change.

VST3 · macOS · PKG installer
Build: November 2, 2026 · 484.4 MiB

Download for macOS
Download source code · 106.7 MiB GPLv3 licenseChecksums

This installer is not signed with an Apple Developer ID. macOS may block installation. Keep backups of important projects when testing an early build.

Drive 0% / Clean

Linear

Keep scrolling. Your scroll is the knob, and these are Viral's own distortion curves.

02 / EQUALIZER

Your EQ.
Always moving.

Viral's equalizer is made to be modulated. SHIFT moves every band together, MORPH moves them in opposite directions. Set your curve, put an LFO on either one and hear it move.

Viral's equalizer opened up to full size: a magenta curve with three numbered bands over a live spectrum, with FREQ, GAIN and Q knobs for each band and SHIFT and MIX beside them.
The same equalizer at full size, with its bands over the live spectrum
03 / PLUGINS

Your plugin.
Inside the rack.

Load VST3 and CLAP effects right into Viral's rack. Adjust them there, or open the full plugin window when you need it.

04 / VOICE

Your sound.
Every detail.

Envelopes, LFOs and your waveform in view. Take a closer look at Viral's Voice interface.

Viral Voice view showing a magenta volume curve and waveform alongside cyan modulation curves.

More is taking shape.

Explore free Bitwig devices and UUID tools while the next chapter of Viral takes shape. More Viral updates and support options will follow.

Free Bitwig downloads