Viiri Audio has released Aava, a creative convolution processor for macOS, Windows, and Linux.
Convolution plugins usually make me think of realistic spaces, speaker cabinets, springs, plates, and other practical IR-based effects. But the thing with IRs is that, once captured, they remain static.
Aava takes a more experimental route by treating impulse responses as sound design material that can move, shift, sync, and change while the plugin is running.
The key feature is real-time control over impulse response parameters.
Aava can change the IR start time, length, pitch, timing, fades, and other parameters without glitches, pauses, or crossfades, even while tails are still ringing out.
That opens the door to much more than loading a room impulse and calling it a day. You can layer up to four impulse responses, each with its own parameters, and use the plugin for evolving spaces, rhythmic effects, pitched resonances, strange delays, and mangled textures.
Aava has two main IR modes.
Pitched mode is designed for tonal impulse responses such as drones, with automatic pitch detection and key tracking from incoming MIDI notes.
Rhythmic mode is for drum loops and other rhythmic samples, with BPM detection and host tempo sync for keeping the IR speed locked to the project.
However, the modulation system is probably the main part of the plugin. Aava includes LFO, sample and hold, AD/AR envelope, envelope follower, and key follow modulators, and parameters can themselves be modulation targets.
The internal LFO and sample and hold modulators can run up to 100 Hz, so this can get into audio-rate territory if you want to push it.
The IR editor lets you load or record impulse responses up to 600 seconds long. IRs can be recorded from the main input, sidechain input, or the plugin’s wet output, and Aava can keep using an IR while it is recording.
Another interesting feature is the Explore Map. You can save complete plugin states as nodes on an X/Y-style map, then move between them to interpolate the settings. It can work as a performance control, or you can use it to fade IR parts in and out.
Aava also includes a spectral compressor for controlling resonant peaks and runaway levels, 100+ presets, and a visual IR editor for trimming and adding fades. The preset categories give a good idea of the direction here, with names like Impossible Spaces, Mangle, Movement, Pitched, Unfathomed, and Vast.
The plugin is available at an intro price of €79 / $79 / £69 until June 15th, 2026. The regular price will be €99 / $99 / £89. A fully functional 30-day trial is available without an email address, and Viiri Audio also offers a 30-day money-back guarantee.
Aava is available in CLAP and VST3 formats for 64-bit hosts on macOS Big Sur or newer, Windows 10 or newer, and Linux with glibc 2.30 or newer. License activation can be handled with a one-time online activation or offline activation by uploading a file.
More info: Viiri Audio Aava (€79 intro price until June 15th)
Last Updated on May 21, 2026 by Tomislav Zlatic.
