Music Composition with Captain Plugins.

The ultimate tools for better music composition..

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Captain Plugins are 64-bit and support VST2 technology

What is music composition?

Music can be composed in so many ways. From writing sheet music, tinkling the ivories or even whistling a tune, to high-tech computer wizardry, there’s a method to suit everyone.

There are even gadgets that will compose music for you! But, for centuries, one key factor has prevented many people from composing music: Theory.

By definition, music is a series or collection of notes arranged in an organized manner. This organization is what we call theory. And without an understanding of theory, it’s very hard to compose good music. At least, it used to be.

Enter, Captain Plugins…

Buy Captain Plugins today

Complexity, simplified.

On demand.

Using Captain Plugins is like having a virtuoso composer that you can call on a whim. From chords, bass-lines and melodies to harmonies, exotic scales and scale-locked keyboards, you can compose incredible music and let Captain Plugins take care of the theory. Any genre, any style. Captain Plugins has your back.

Buy Captain Plugins today.

Captain Chords.

Epic chord composition.

Captain Chords helps you compose stunning chord sequences. It’s fast, simple to use and great for novices and seasoned composers alike.

Choose your key and scale, and Captain Chords suggests complementary chords that combine beautifully.

Or, choose from dozens of hit chord progressions that have been used time and again by great composers.

In key. In scale. In style.

Flip the script on traditional composition methods. Captain Melody gives you control of every aspect melodic composition.

Visualize your melody, follow your chord progression, create instant harmonies and much more. Captain Melody is unrivalled melodic composition software.

Captain Melody.

Captain Beat.

The Ultra-Modern Beatmaking Plugin

Compose better drums with Captain Beat. You can mix and match patterns and sounds on a per-channel basis. That means any combination of rhythmic ideas and any combination of drum sounds. You can even add your own.

A slick interface allows instant creativity. Visualize your waveforms as they take shape. Export as Audio or MIDI.

The future of drum VST plugins is here.

Captain Beat VST + AU plugin

Captain Play.

Jam smarter.

  • Play 4 octaves of notes in any Key and Scale using your computer keyboard
  • Always play the right MIDI notes in-scale. Come up with your own melodies that sound great
  • Play complex chords with one key-press
  • Make your own melodies and chord progressions with your own fingers – no presets needed

Captain Deep.

Bass that follows the chords.

  • Write basslines that groove along with your chords
  • Connect the Deep plugin with Chords plugin
  • Apply different rhythms
  • Follow the chords: any change in your Chords plugin will auto-adjust your bassline
  • Hear the bass with different bassline sounds

Get Captain Plugins Now

Buy Captain Plugins today

Available for Mac and Windows.

Comes with a 30-day money back guarantee. Created by Mixed In Key.


David Guetta

“Captain can inspire you. I’m using it every day and showing my friends. Captain Melody is super convenient for songwriting. I love the color feature that tells you how stable the note is in the scale. It’s also cool to see what melodies are suggested when you are looking for a new idea.”

Laura Escudé

“This is totally for me. I can take ideas that I play on violin, drop them into Captain Plugins, and come out with a super chordal sequence that I couldn’t come up with on my own.

Captain Plugins will take your music production to the next level.”


“I’m loving Captain Plugins and I used it on two tracks. It’s a super cool plugin. I just love that it promotes inspiration. It’s the perfect spot to get ideas going. I’m always looking for that spark of creativity and Captain always provides that!”

Ebonie Smith

“I love the Captain plugins by Mixed In Key. They really help facilitate programming in a streamlined way. I am able to produce quickly and efficiently while on-the-go.”

Chus and Ceballos

“If you’re writing chords, this is a must-have plugin. It’s faster than working on the keyboard and you can be more creative and just let your creativity come out.”

Morgan Page

“Captain Chords is an essential tool for modern composing. I love the new strum feature”

Rony Seikaly, Sugar Free Radio

“Captain Chords helps you add color and mood to underground tracks. It’s amazing.”

MG the Future

“These plugins close the door on the past.”

Felix Cartal

“Captain Chords has become really valuable to me when I don’t have a MIDI keyboard handy. It allows me to build out interesting chord progressions quickly wherever I am with just my laptop. I love this tool because it shows me chord options I may have not thought of.”

David from Domino Saints

“For me, it’s all about the song. Finding the right chords and feeling is the most important part to making a smash track. Captain gives you the tools you need to push boundaries in your songwriting.”

Lost Stories

“Captain chords and melodies has helped us in writing better songs in more creative and efficient ways. Amazing tools, a must have for every producer”

Fabian Hernandez

“Captain Chords helps me go where I’ve never been before. I’ve been a songwriter for 15 years, and Captain is helping me renew my inspiration.”


Computer Music innovation award

Computer Music Magazine


“Innovation Award”

“Captain Plugins is a highly productive harmonic and melodic toolkit for experienced musicians and total newcomers to composition alike. Winner of the Innovation Award.”

Digital DJ Tips review

Digital DJ Tips

Rating: 5/5 ⭐⭐⭐⭐⭐

“Captain Plugins is an essential tool for any DJ/producer. No other composition plugins are as intuitive, simple and great-sounding as Captain Plugins. Highly recommended for DJ/producers and music composers of all styles and skill levels.

Magnetic Magazine

“The Captain Plugins team have created something truly unique in the world of software plugins. I think they nailed what they were going for, and I would definitely recommend giving these plugins a try.”

Beat Magazine review

Beat Magazine

Rating: 10/10 ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐

“Thrilling melodies and chords to help you build a solid foundation for your songs. We are making a clear Buy recommendation.”

Jim Stout

Jim Stout

“As a sound designer, Captain Plugins allows me to create musical elements in new and creative ways. It’s the perfect springboard for inspiring new ideas.”