Music

Full songs froma single prompt

Describe a vibe and Theo composes two full songs — with AI cover art and a karaoke player that streams time-synced lyrics. Write your own lyrics or let Theo write them, remix your own recordings, and build a library of tracks.

Free forever — no credit card required
opencharts.com/symphony
Midnight Compiler
dreamy synthwave · v1 of 2
1:123:04
2 versions composed
Synced lyrics
How it works

From a vibe to a finished track

Describe it, get two takes, play the karaoke, and refine on the same thread. Step through each beat.

Start with a style. Give Theo a genre and a topic — or open the Advanced studio. Write your own lyrics, let Theo write them, or go instrumental.

opencharts.com/symphony
A dreamy synthwave track about late-night coding
synthwavelo-ficinematicpophip-hopambient
Capabilities

A full music studio in a chat

From ad jingles to album-ready tracks — composed, covered, and organized.

Two versions per song

Every request composes two takes in parallel so you can pick the one that hits — no re-rolling from scratch.

Lyrics your way

Write your own lyrics, let Theo write them from a topic, or go instrumental. A songwriting pass keeps hooks tight.

Karaoke player

Each song ships with a 9:16 player that streams time-synced lyrics over the artwork — plus full-screen immersive mode.

AI cover art

Every version gets its own generated cover art matched to the song's mood, ready for sharing.

Start from your own audio

Record or upload a clip and Theo can cover it (keep the melody, restyle everything) or borrow its style for a new track.

Revise on the same thread

“Make the chorus more upbeat” or “switch to acoustic” re-renders new takes while keeping the song's identity.

Your song library

Every generation lands in your library with playlist-style workspaces to organize tracks by project or mood.

Quality tiers

Pick fast drafts for exploration or premium renders when it matters — Theo routes each request to the best engine mix.

Every genre

Pop, hip-hop, EDM, lo-fi, cinematic scores, country, jingles for ads — describe the style and Theo composes to it.

How it works

1

Describe the song

Give Theo a style and a topic — “dreamy synthwave about late-night coding” — or open the Advanced studio for full control.

2

Choose your lyrics

Paste your own lyrics, have Theo write them, or keep it instrumental. Add your own audio if you want a cover or remix.

3

Get two takes

Theo composes two versions with cover art and synced lyrics. Play them side by side and keep your favorite.

4

Refine and share

Ask for revisions on the same thread, then download the track or share it straight from your library.

Frequently asked questions

How long does it take to generate a song?

Songs render in the background — typically a few minutes for both versions, including cover art and synced lyrics. You can keep working anywhere in OpenCharts and get notified when they're ready.

Can I use my own lyrics?

Yes. Paste complete lyrics and Theo composes around them, give it a topic and it writes lyrics with a professional songwriting pass, or skip lyrics entirely for an instrumental.

Can I remix my own recordings?

Yes. Record from the mic or upload a clip, then choose cover mode (keeps your melody and words while restyling the production) or style mode (borrows the vibe for a brand-new track).

Can I edit a song after it's generated?

Ask for a revision in the same thread — “more upbeat chorus,” “swap to acoustic,” “slower tempo” — and Theo renders fresh takes that keep the song's style and lyrics intact except for your change.

Where do my songs live?

Every song lands in your Symphony library with its versions, artwork, and lyrics. Organize tracks into playlist-style workspaces and play them anytime with the karaoke player.

Ready to try Theo Symphony?

Free to start, no credit card needed, and your whole team can join.