Versien Composer’s Atelier

Room for
the unwritten.

Find a progression. Make it yours.
Hear where it goes next.

A place to explore harmony, shape the details and turn a musical thought into a song.

Coming soon
Inside the atelierCompose · a closer look

Make one chord
speak differently.

Start with a phrase. Select a chord, compare suggestions and hear the change inside the section.

Close-up of a two-bar phrase with Am7 selected, followed by Dm9, G9 and Cmaj9, plus key and transposition controls.Close-up of a two-bar phrase with Am7 selected, followed by Dm9, G9 and Cmaj9, plus key and transposition controls.
Am7 to Am9. A little more colour.

The same place in the phrase. A different possibility.

Edit Am7 with the Am9 suggestion selected, its musical explanation, Hear in section and Apply change.Edit Am7 with the Am9 suggestion selected, its musical explanation, Hear in section and Apply change.

Space for instinct. Tools for craft.

The chord in front of you.
The song taking shape.

Some ideas begin with a sound. Others with a style, a phrase, or a chord you keep coming back to. Versien gives you room to follow that instinct—and tools to develop it with intention.

From first thought to full song

One idea.
Room to grow.

01Explore

Find your starting point.

Browse musical styles, filter by direction or tempo, and hear progressions with context. Bring a study into Compose, or begin with your own chords.

02Compose

Make the phrase yours.

Edit a chord by name or with piano / MIDI input. Shape its duration, bass and voicing. Keep the moments you love, and audition alternatives around them.

03Structure

Give the idea a larger shape.

Connect sections, reuse a verse, build a contrasting chorus and set repeats. Hear transitions in context, then listen through the complete song.

ExploreFind a phrase
A close-up of a Neo-Soul starting point: Cmaj7, Am7, Dm7 and G7, with its musical context, Preview and Use in Compose.A close-up of a Neo-Soul starting point: Cmaj7, Am7, Dm7 and G7, with its musical context, Preview and Use in Compose.
Open a style, hear its starting points and bring a phrase into Compose.
StructureBuild the song
Close-up of the ten-bar section timeline: Verse, Lift, Chorus, Verse and Chorus, with bar positions and move handles.Close-up of the ten-bar section timeline: Verse, Lift, Chorus, Verse and Chorus, with bar positions and move handles.
Verse, lift, chorus. Reuse sections and hear how the whole idea unfolds.

A musical language to explore

Follow your curiosity.

Start with a tradition, a mood or a kind of movement. Hear what gives a style its character, then find your own direction within it.

Piano keys and felt beside a softly lit electric-piano room

R&B & soul

Colour, pocket, return

Explore extended chords, close movement and a different way back home.

A keyboard and microphone in a warm rehearsal space

Pop

Contrast, lift, release

Find a familiar starting point, then give the next section its own character.

Guitar and drum textures beside a warmly lit courtyard

Latin

Rhythm, tension, arrival

Explore distinct traditions, from bossa nova’s quiet colour to flamenco’s pull.

A few directions from the current style library.

Hear the choice in context

Small changes.
Musical purpose.

Try more movement, a richer harmony or a new key. Compare before and after within the phrase, then keep the choice that serves your music.

01 / Movement

Change the pace.

Introduce passing movement, reshape a held chord or give a phrase more breathing room.

02 / Reharmonize

Change the colour.

Explore richer, gentler or darker harmony, and stronger arrivals around the same home.

03 / Key & mode

Change the horizon.

Hear routes to related keys and major or minor adaptations while keeping the section’s length.

Keep the music moving

An idea worth returning to.

Hear it performed.

Choose chord accompaniment with its own rhythm, accents and voicing. See the performed notes in the piano roll.

Build a collection.

Save named ideas, search your collection and return to the sections and chords that started them.

Take the MIDI onward.

Export a section or the complete song as performed MIDI, ready to continue in your own setup.

Notes & piano rollHear it performed
Close-up of the piano roll’s upper voices and performed note timings across Am7, Dm9, G9 and Cmaj9.Close-up of the piano roll’s upper voices and performed note timings across Am7, Dm9, G9 and Cmaj9.
Hear the rhythm. See the voicing. Export the complete performance.

Versien — Composer’s Atelier

Compose
with intention.

Versien is in development. Public purchases, preorders and downloads are not available yet.

Coming soon

A place in your studio.

A native macOS edition is in development, with DAW tempo follow and built-in preview instruments.

Release availability and supported hosts will be announced as development continues.

Your privacy choices.

Choose whether this website can use optional analytics.

Google Analytics

Helps us understand visits, traffic sources and how people use the website. Off until you allow it. Google advertising features are disabled.

When enabled, Google receives usage and device information and uses analytics cookies. We limit those cookies to 180 days on this website. Turning analytics off stops collection and removes these cookies; the page will refresh.

Your choice is stored in this browser for 180 days. If browser storage is unavailable, it applies to this page only. Changing your choice does not delete information already collected by Google.

Appearance settings are stored separately from your analytics choice. The public store is closed, and this website does not load Moonbase’s store, account or payment services.

How Google uses information Read our privacy policy