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What is it?
Operating System Availability
Operating System Latest Version
System Requirements
Windows 7/8/10
32/64-bit VST Compatible DAW
System Requirements
OS X 10.7+
64-bit VST Compatible DAW
System Requirements
Ubuntu 18.04+
64-bit VST Compatible DAW
License & Installation Method
Instant (Serial Number)
What does this mean?
Important Note
Due to MIDI routing limitation, Phrasebox is not compatible with Reason, Machine, Logic or VST3.
For related news items, downloads and more please see the full KVR product page for

Phrase Arpeggiation

Turn simple chord sequences into expressive melody lines and musical phrases. Simply design your phrase in the piano roll, and Phrasebox will play back the pattern using whatever notes you input.

You have complete control over how the phrase is played. Select notes in pitch order, or use the special selectors – such as the loudest/quietest or first-played/last-played. Your phrase will be played back with sample-accurate timing.

DAW-Like Control

Phrasebox isn't like traditional step sequencers or arpeggiators – you have full control over the timing and length of notes as you would in your DAW. Alongside velocity controls, you can also adjust each note's transposition, and even select a random chance that the note will play.

If your transpositions end up falling between the notes of a scale, you can enable the "Lock To Key" feature to make sure your riffs are always in tune.

Controller Editing

Alongside note patterns, you can also send MIDI controller data. With up to 8 assignable controllers, you can design everything from piano parts using the hold pedal, to automated synth filters and pitch bends to make the perfect melody line.


If you want quick access to an unlimited number of phrases, you can use the built-in generation tools to quickly get inspiration. Simply set how you want the notes and controller data to be generated, and Phrasebox will create a unique phrase pattern with just the click of a button.

{See video at top of page}

User Reviews Average user rating of 5.00 from 1 reviewAdd A Review

Reviewed By csanders00
January 27, 2020

Simplest harmony based sketching and composing.

I've tried many products on the in this realm of audio plugins and out of all of them PhraseBox was the easiest to setup, play with and understand. I was able to get going with most of its features in under 10 minutes:

  • Its easy: PhraseBox doesn't require you to learn a new mental model for abstracting musical notes and harmony. You put your chords in your daw, and you add or remove notes in Phrasebox, much like you would in your DAW's piano roll. If you know how to write chords and use a piano roll, you know how to use PhraseBox.
    • Contrast this with a product like Cognitone's Harmony Navigator and Synfire. In order to be productive, you're going to have to install multiple pieces of software, route your audio and then learn an entirely new mental modal for music composition.
  • Its not a limited or a toy: PhraseBox doesn't try to replace your own creativity, it assists in getting you "in the zone" faster so you can start creating. PhraseBox isn't a "Black Box", its more like simple way of using a piano roll for sketching melodies / phrases.
    • Contrast this with some products which say they will compose your the music for you but end up generating cliche garbage.

Couple of things I would like to see in future releases:

  • Ability to select a group of notes and copy / move them inside the piano roll.
  • Maybe some more advanced piano roll features, sort of like some of the ones featured here: https://www.youtube.com/watch?v=qQqzSudCRyk
  • Midi Out. Easily get the generated MIDI out of the plugin, without having to reroute to another MIDI channel in the daw.
    • Some people have suggested MIDI Drag and Drop.
  • More Banks :).

I'm running Phrasebox in Bitwig Studio in ArchLinux.

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