“Microtonal Polyphonic Shiny Dirt” – new free VST, 5376 microtonal tunings, 128 pre-sets




This works on 64-bit Reaper, and on some other 64-bit DAWs.  But also try try our 64-bit-only VSTs. 64-bit “Simple Microtonal Synth” and Simple Microtonal Sampler, 64-bit Windows, v1.0.

(Check our new record that uses this synth extensively. Free to listen or download: Microtonal Cats from Alpha-Centauri)

YouTube walk through of this VST and my other microtonal VST.

Note: if you want to use this synth non-microtonal, use the Tuning setting of 12 EDO.

Other VSTs we make, including some microtonal

Microtonal Polyphonic Shiny Dirt is a free polyphonic VST microtonal Windows synth from Michael W. Dean of BipTunia.

It’s very easy to use. Yet it is robust, and will give you power.

Microtonal Polyphonic Shiny Dirt has 128 pre-sets, and 5,376 microtonal tuning options.

Microtonal Polyphonic Shiny Dirt is a no-nonsense introduction to microtonal synthesis, It’s great for heavy bass, forceful leads, crystalline chimes, and more.

TIP: Don’t be afraid to experiment with microtonal music if you don’t yet understand the math.

While eventually learning the math is good, and we included resources for that. And with this VST, no math is even needed to start making cool microtonal music.

In fact, an ability to create compelling music with a tiny bit of understanding of microtones will go much further than the opposite.

Microtonal Polyphonic Shiny Dirt…is a very musical homage to circuit-bent analog synths.

Microtonal Polyphonic Shiny Dirt is microtonal and polyphonic, but is also all about the mod wheel. The mod wheel does something different on each pre-set.

VST ID of Microtonal Polyphonic Shiny Dirt: MPSd


Unzip and put the folder \MicrotonalPolyphonicShinyDirt inside your DAW’s VST folder.

System Requirements:

Microtonal Polyphonic Shiny Dirt is a 32-bit Windows synth, but it tested fine on 64-bit Reaper, and of course also on 32-bit Reaper. It should work on any 32-bit DAW, and on many 64-bit DAWs.

Though in 64-bit Reaper, the presets will show up in a second window, like this:

(^ If the window on the right isn’t wide enough to see all the preset names, you can grab either side of it with your mouse, hold down the left  mouse button, and drag the window wider.)

If you can’t even see the main colorful window with the kitties, click the button on the VST picker that says “Show UI” (user interface):

GETTING TO KNOW Microtonal Polyphonic Shiny Dirt

SO…This VST has 128 presets, and 5,376 tunings (scale files, in MTS format).

The first 32 pre-sets are microtonal. The rest are in normal tuning, but will retain the last microtonal tuning you used, until you set your own tuning (more on that in a moment).

Each preset has a different tuning, but you can use the picker to add any of the tunings to any of the presets. You can also make your own synth patches. And, if 5,376 tunings isn’t enough, you can add your own tunings. They should be in MTS file format, put into the \MicrotonalPolyphonicShinyDirt folder inside your VST folder. You can make your own scales using Scala, which is free.

The order of MTS files in our presets are set up somewhat randomly, to encourage experimentation. But you can stop using the set tunings in a given preset at any time, and pick your own. You do this by clicking on the file picker near the bottom right, on the “CHOOSE MTS TUNING FILES” section at the bottom, and picking any of the 5,376 scales.

The archive also includes Sevish’s PDFs about many of the tunings, included at his suggestion. They are a great read. Very educational, but not at all dry.

(Check out Sevish’s Resources for Microtonal Musicians page.)

If you read about a tuning you like and want to try it, you can click the file picker icon in the bottom right of the User Interface, circled here in blue:

This will open up the list of tuning MTS files. From there you can just go down the list and try different scales, or you can find specific ones; there is a search function where you can type the scale name. It will bring up your result or results:


From there, click on the file icon to use the scale. (Where it says hulen_33” in the above image. But it will be replaced by the name you searched.)

Tip: If you want to play in typical western 12-tone equal temperament, pick setting 33, called “NOT MICROTONAL.”


WHEEL CHOICE                   PANEL

PM DEPTH                             Zzerp

INPUT 1                                  Newman

PITCH                                     Moo

RESONANCE                        Rez

SIGNAL                                 (Moog, signal – not on panel)

PHASE MOD                         Subtle

MODULATION                      fBack – {is delay feedback.)

PULSE WIDTH                     LFO drop down, bottom choice.


Microtonal Polyphonic Shiny Dirt has a cool frequency meter, and. This is a diagnostic tool used while making a VST, but usually removed before outputting for the public. I like it, so left it in. It’s stoney and groovy. But they also teach you a bit about how this all works, and what audio synthesis actually is.

The mod wheel on Microtonal Polyphonic Shiny Dirt is unique. It controls a combination of sustain, phase mod, and pulse width. It’s somewhat more subtle than many expect from a usual mod wheel, but very useful in creating a shimmer or vibrato by hand.

The mod wheel will do more on some presets and patches than on others. And will do more in some octaves than on others.

We recommend you try patches and tunings you like in different octaves as well. And with single notes, two- and three-note chords, and also try chords with more notes.

This synth will also produce very interesting results with an arpeggiator. Try it!

The pitch wheel on your MIDI controller will control pitch. The amount you can bend with it is different on some presets, and can be changed manually with the “Pitch Wheel” switch.


Enjoy, and please tell two friends.

If you want to donate, there are links on the left sidebar for patreon, Bitcoin, and PayPal. Or you can buy one of my albums for you or a friend, on BandCamp, or any of these services:


Jef McClintock showed me how to add the microtonal function. (Though I simplified it.) Thank you, Jef!

And thanks to Nora Leader for helping me get rid of the errors in file picking the MTS files.

The MTS files for the tunings came from these three sources; Scala archiveXen-Arts, and Sevish. Thank you.

I made the scale 120 EDO.

Thank you to Manuel from Scala for help on how to convert his 4000 .scl files to .mts files.

Microtonal Polyphonic Shiny Dirt was made with SynthEdit.

Check out our other free VSTs here.

Check out my microtonal  music here.



  • Drag You Thru Dirt
  • Don Wormovanni
  • Underground
  • Dust 2 Dust
  • Dirty Bird Eagle
  • Grounded
  • In the Dirt
  • Beat the Rug
  • Air That Laundry
  • Curly Dirt
  • House Moss
  • House Moss 2
  • Pay Dirt
  • Will Worm for Worms
  • Outstanding in His Dirt
  • Hit the Dirt
  • Dirt Nap
  • Onan’s Dirt Road
  • Compost
  • Crop Dusting
  • Dusty Wheels
  • Wheel in the Sky
  • Wheel Turns in Dirt
  • Muckraker
  • Sines on a Dirt Road
  • Whisky in a Dirty Glass
  • Re-Dirt
  • Dirty Faces
  • Stuck in Dirt
  • You Toe Up
  • Junk Man!
  • Beat Your Rug
  • Move Yo Wheel
  • Ghost to Ghost
  • Art Hell
  • Do You Like Worms?
  • A Worm in the Hand
  • Worm Your Way In
  • Don’t Worm Me Bro
  • Poly Wanna Worm?
  • Slow Dirty Wheel
  • 2 Worms and a Microphone
  • Gummies
  • Worms Ahoy!
  • Night of the Living Worms
  • Worming Hard or Hardly Worming?
  • Dirty Gurl
  • Cash Newmann
  • Wheel it!
  • Steelers Wheel
  • Worm Bell Jar
  • Shivers up the Wheel
  • Bippertronix
  • The Wormic Flute
  • Wrong Dong
  • Madame Womerfly
  • The Marriage of Wormaro
  • Backworms Wheel
  • Wiggle the Wheel
  • 6 Worms of Henry 8th
  • Journey to Center of the Worm
  • Barber of Squrimville
  • Peter and the Worm
  • White Ghost
  • Pink Ghost
  • Stuff it in a Squirrel
  • Fire Up the Wormicopter
  • In the Company of Squirms
  • Take My Worm for a Walk
  • Dirty Little Squitten
  • Worm Factory Basement
  • WormCoin
  • BipCot NoWorm License
  • Hi-pH Dirt
  • Lo-pH Dirt
  • Chariots of Worms
  • Wish You Were Dirt
  • BitCorn
  • The True Mod Wheel
  • Emerson Worms n Palmer
  • Dirt McQuirk
  • Bird Dirt
  • Soil Ant
  • Dirt Man
  • Bad Man in the Dirt
  • Organic Dirt
  • Diagnostic Dirt
  • Where’s that Dirt?
  • A Bug’s Life in Dirt
  • Orgasmic Dirt
  • Dig In!
  • It’s a Dirty Job
  • Someone’s Gotta Do It
  • Epik
  • Hot Filtered Dirt
  • Worm Me All Night Long
  • In the Company of Worms
  • Gunk
  • Worms Go In Worms Go Out
  • M. Worm Shamalananadingdong
  • Dirty Bird
  • Dirty Pillows
  • Dirt Play
  • Dirt Bath
  • Gunk in the Trunk
  • In the Mud Blood and Beer
  • Rolling in the Dirt Together
  • Show Me What You Got
  • Grave Dirt
  • Picnic at GG’s Grave
  • Graveyard of Life
  • The Great Filter
  • Broadcasting to Alpha-Centauri
  • Moon Dirt
  • Black Hole Dirt
  • Ergosphere Dust
  • Eros 433 Regolith
  • Skid Row
  • Felis Horribilis
  • Felis Bippus
  • Manipuli
  • Taxation is Cruft
  • Talk Show Plasmosis
  • Euroracks Anonymous
  • Pulse Waves Melt Steel Beams
  • Tesla’s Oscillator Weapon
  • Only Dirt and Rubble Remain


VST® is a trademark of Steinberg Media Technologies GmbH, registered in Europe and other countries.

BipTunia Synths has been licensed for VST SDK use by Steinberg. Agreement countersigned by Steinberg on August 23, 2018. 

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5 thoughts on ““Microtonal Polyphonic Shiny Dirt” – new free VST, 5376 microtonal tunings, 128 pre-sets

    1. Just unzip it, and drag the whole folder into your DAW’s VST folder.

      What DAW are you using? And is it 32-bit or 64-bit Windows?

      I sent you an email if you want to answer there.


  1. Just wanted to switch from standard tuning to just tuning, but got overwhelmed with choises. Theres thousands of preset files but I couldn’t get anything done.

    Did not find that Just tuning option…

    1. There are a LOT of Just Intonation tuning choices. They all have names that start with

      Also, I recommend you try our newer microtonal VSTs. They’re better, and more solid, and easier to use:
      “Simple Microtonal Synth” easiest to use microtonal synth, ever.
      “Simple Microtonal Sampler”
      here: https://biptunia.com/?page_id=2070

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