New · DNA

hit DNA. hear it mutate.

Every press rolls a brand new version of the loop you're on. Same key, same length, never the same twice. It's the "show me something I'd never find" button.

MIDIBOY rolling a DNA variation of an A minor melody, with the plain-words readout of what changed

Always in key

It moves the line up or down the scale, flips it upside down, bounces notes an octave, leans on the relative major or minor, or answers bars 1-2 with bars 3-4. It never leaves your key.

Never the same twice

Every loop gets its own path through every move before anything repeats. A new roll has to be at least 20% different from everything you've already heard on that file.

HEAT: subtle to wild

Five steps: SUBTLE, LOW, MID, HOT, WILD. Lock pitch, rhythm or length to keep what you like and mutate the rest.

BACK + codes

BACK steps through every roll to the original. Every version gets a code like 4F-92, so the one you loved is never gone.

Tells you what it did

No theory degree needed. Every roll says what changed in plain words.

down 2 steps · swingcall + answerarp 16thsnew rhythm

Drag the mutation

FIT + DRAG and DISK take the version that's playing. Chords get inversions, spread voicings and arps. Drums get rhythm and length moves only.

Free gets 3 DNA rolls a day. BACK and codes are always free. PRO rolls unlimited.

Disks

keep the keepers. on disks.

Drop any MIDI onto MIDIBOY, name it, load it on a disk. Edit it with every knob, flip it, and when the disk's full, export it as a kit.

01
drop it in.
Drag any .mid from your desktop onto MIDIBOY. Name it, pick a disk, done. If the name says "A#min", MIDIBOY reads it.
02
load the disk.
Name it, colour it, fill it up. Your favourites already live on one, and PRO stacks as many disks as you want.
03
edit it. flip it.
Open any loop with every knob: key, octave, tempo, snap, plus ½× 2× REV. Stack REV on a speed. SAVE keeps the edit as a new loop.
04
export the kit. PRO
One click zips the disk into a kit: sorted folders, key and tempo in every name, a WAV preview of each loop and a cover. Ready to send or sell.

INSERT DISK

neon dripA# minor · 144EDIT

glass keysF minor · 140EDIT

slide 808A# minor · 144EDIT

hat roll 2140EDIT

neon drip [half rev]A# minor · 144EDIT

neon drip

½×2×REVEXPORT KIT

late night kit.zip ✓

A stack of translucent MIDIBOY floppy disks in pink, purple, blue and green

What's in a kit

late night kit.zip
├─ Melodies/
│  └─ nik - neon drip - A#min - 144.mid
├─ Chords/
│  └─ nik - glass keys - Fmin - 140.mid
├─ 808s/
├─ Drums/
├─ Previews/   a WAV of every loop
├─ cover.png   the disk, as art
└─ license.txt

Tagged. Sorted. Previewed. Cover art done.

Get PRO · $15 once

How it works

from "i've got nothing" to a loop on the track in about ten seconds.

01 · SCAN

point it at your folder. walk away.

MIDIBOY reads every MIDI file you own and works out what each one is: melody, chords, drums or 808, plus its key, tempo, length and feel. The first scan takes a few minutes. Every one after that is instant.

Finds the duplicates packs leave everywhere
Colour-codes every part, with a label so it never relies on colour alone
Read-only. Your files stay exactly where they are

MIDIBOY showing a chord progression in F minor

02 · SHUFFLE OR SEARCH

can't pick? spin it.

SHUFFLE runs the reel and lands you on something you forgot you had. Every card shows the actual notes, so you know what's coming before it plays. Or just type what you want.

dark chords F minor808 140fast lead no drumsstacked 4 bars

03 · FIT + DRAG

bend it to your beat. drop it in.

Turn KEY, OCTAVE and TEMPO and the file changes before it leaves. SNAP pulls stray notes into your scale. Then drag FIT + DRAG onto any track. Hit AUTO and every file plays the moment you land on it.

Transposes the shortest way round
Plays through its own sound, or your instrument with HOST
Saves a copy of every pick, fitted

Built like hardware

a MIDI browser that feels like gear.

Every control has a job, every state is obvious, and it lives inside your DAW, not in another window you forget about.

Lives in your DAW

VST3 and AU plugin plus a standalone app. It reads your project's tempo, the spacebar stays yours, and LEVEL sets how loud MIDIBOY's own synth plays.

Search like you talk

Type "dark chords F minor" or "no drums". It already knows what every file is, because the scan worked it out. PRO can HIDE the packs you never touch.

Every part, colour-coded

The type shows at a glance.

MELODYCHORDSDRUMS808

Library audit

How much you own, how much of it is copies, and which packs take up the room.

Flip it: ½× 2× REV

Hear any loop half time, double time or backwards. Stack REV on a speed. FIT + DRAG keeps the flip.

Two finishes

Black anodized or raw steel, switched from the footer. Pick the one that matches your rig.

Pricing

start free. go PRO when it's hooked you.

Free

$0forever

Scan your whole library
SHUFFLE reel
10 FIT + DRAGs a day (key, octave, tempo, snap)
Auto-audition
3 DNA rolls a day (BACK + codes always free)
½× 2× REV flips
A disk: drop any MIDI on it, name it, edit it
Library audit
VST3, AU and standalone app
Mac and Windows, one download

Download free

PRO

$15one time

Everything in Free
Unlimited FIT + DRAG
Unlimited DNA rolls
Search by name, pack and feel
Key, bars, tempo and feel filters
HIDE the packs you never use
Unlimited disks
EXPORT KIT: zip a disk with previews + cover
One key, two computers, Mac or Windows. Yours for good

Get PRO

Secure checkout by Gumroad. Tax handled at checkout. 14-day refund, no questions asked. Mac + Windows included.

FAQ

questions, answered.

Does it touch my files?

No. MIDIBOY only reads. It never moves, renames, deletes or uploads anything. When you FIT a file, it saves a new copy to Music › MIDIBOY Picks and leaves the original alone. Drop a MIDI onto a disk and MIDIBOY keeps its own copy, so the file you dropped stays where it was.

My Mac says MIDIBOY "can't be opened"?

That's macOS being careful with new apps. Click Done, open System Settings › Privacy & Security, scroll down and click Open Anyway next to MIDIBOY, then Open. You only do it once, and the plugin works in your DAW after that.

Windows says "Windows protected your PC"?

That's SmartScreen being careful with new apps. Click More info, then Run anyway. The installer puts the app in Program Files and the VST3 where every Windows DAW looks (Common Files › VST3). Rescan plugins in your DAW if MIDIBOY doesn't show up.

What does DNA do?

Press DNA and MIDIBOY plays a new version of the loop you're on. It stays in the same key and the same length, and it's at least 20% different from every version you've already heard. HEAT sets how far it goes, from SUBTLE to WILD. BACK walks you back to the original, and every version has a code so you can call it back later. FIT + DRAG and DISK take whatever version is playing. Free gets 3 rolls a day, PRO is unlimited.

What's a disk?

Your own stash of loops, shown as a little translucent floppy you name and colour. Drop any .mid onto MIDIBOY to put it on one, or hit DISK on any loop you're browsing. Tap EDIT on a disk loop to change its key, octave, tempo or flip it, and SAVE keeps the edit. Free gets one disk. PRO gets as many as you want, plus EXPORT KIT.

Which DAWs does it work in?

The VST3 plugin loads in Ableton Live, FL Studio, Cubase, Bitwig, REAPER, Studio One and Reason. The AU loads in Logic Pro and GarageBand on Mac. For anything else, including Pro Tools, run the MIDIBOY app next to your DAW and drag files across.

Mac or Windows?

Both. Mac runs natively on Apple Silicon and Intel. Windows 10 and 11 (64-bit) are in beta: the app, the VST3 and the scanner all pass our tests, and we're polishing the last edges with early users. Your download includes both installers, and one PRO key works on either, up to two computers.

What's the difference between Free and PRO?

Free lets you scan, shuffle, audit, FIT + DRAG 10 times a day and roll DNA 3 times a day. PRO unlocks unlimited FIT + DRAG, unlimited DNA, search, the key, bars, tempo and feel filters, HIDE, unlimited disks and kit export. It's a one-time payment with no subscription.

How many computers can I use PRO on?

Two. Moving to a new machine? Click PRO, then DEACTIVATE THIS COMPUTER, and your key is free to use on the new one.

What if it's not for me?

You get a full refund within 14 days of buying PRO, no questions asked. Email support@midiboy.live or reply to your receipt. Your key stops working once the refund goes through.

Do I need to be online?

Only to activate PRO. After that it checks in every few days and keeps working offline for up to 30 days.

Something not working?

Email support@midiboy.live with what happened and your DAW. A real person reads every message.

Where does the MIDI come from?

Your own drive. MIDIBOY organizes the packs and files you already have and doesn't ship any MIDI of its own.

	Folders + your DAW's browser	MIDIBOY
Find a chord progression in F minor	Open files one by one	Type "chords F minor"
Know what a file is before opening it	Guess from the file name	Melody, chords, drums or 808, plus key, tempo and bars
Get it in your key	Transpose by hand, fix wrong notes	Turn KEY. SNAP fixes strays
Hear it at your tempo	Drag in, then set it up	Auto-plays at your project tempo
Beat idea-block	Scroll and hope	SHUFFLE
Get a fresh take on a loop	Rewrite it by hand	DNA: a new in-key version every press
Clear out the clutter	No idea what's a copy	Audit finds every duplicate

every midi you own. one screen.

one shuffle. one drag. in a real session.