XenRoll – Microtonal Piano Roll

Tired of your melodies sounding stiff and locked to the same old 12-tone grid? Check this out.

Let’s keep it 100 – one of the biggest workflow killers in the studio is fighting your DAW’s clunky pitch-bend automation. You hear a crazy, wavy synth slide or an 808 glide in your head, but trying to draw it in perfectly with a mouse just ruins the vibe. Not to mention, if you’re trying to tap into global scales or authentic non-Western tunings, a standard piano roll straight up boxes you in.

When your pitch is rigid, your track sounds lifeless, and those frequencies just don’t sit in the mix the way they should. Enter XenRoll.

Why XenRoll is a Game-Changer for Your Mix & Workflow

This open-source gem completely reinvents how we sequence melodies. Here is how XenRoll is going to sauce up your production:

Dial in the Perfect Pocket: With 1-cent pitch accuracy (1200 EDO), you can microtune your notes until they sit absolutely perfectly in the mix, giving your chords insane headroom and clarity.
Draw Bends with Your Voice: You can literally sing or hum into your mic to generate real-time pitch curves. No more tedious mouse clicks—just pure, humanized bounce.
Visual Mix Feedback: The unique pitch memory model and dissonance submodels actually show you how stable, consonant, or beating your chords are. It’s like having an X-ray for your harmony.
Flawless Note Glides: Bend notes individually with highly visible, intuitive controls. Your 808s and synth leads are going to glide like butter.
Ghost Notes for Days: Run multiple instances and import/export tracks effortlessly while referencing ghost notes to keep your whole arrangement locked in key.

⚡ Pro Producer Tip: The Vocal-to-MIDI Hack

Use XenRoll’s real-time singing/humming feature to map out complex pitch slides for your basslines. Instead of drawing robotic automation lines, just hum the glide you want into your mic. Apply that exact organic curve to your 808s or lead synths to make them slap with an undeniable, human feel.

Tech Specs (Keep it Light)

OS Support: Windows, macOS, Linux (Everybody eats!)
Footprint: A stupid-light 10.9 MB. It won’t eat up your CPU, leaving plenty of headroom for your heavy effects.
Price: 100% Free and Open-Source.
Under the Hood: Full MPE and MTS-ESP support, making it the ultimate powerhouse for modern microtuning setups.

The Verdict

XenRoll is an absolute must-have if you’re trying to break out of the standard MIDI box. Whether you want to experiment with crazy microtonal scales, build lush, beating synth chords, or just want a faster way to map out pitch bends, this joint delivers.

It brings a totally fresh workflow to your DAW and gives your tracks that organic, wavy feel that separates the pros from the bedroom beatmakers.

Video examples

Visit Developer Site

XenRoll.0.4.3 ( 11 MB )

Let me know in the comments how this sits in your latest project! Are you ready to break out of the standard 12-tone grid and get weird with your melodies? Let’s talk shop below! 👇

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.