Built for how music actually gets made.
Three systems. One coherent workflow. Skill builds your taste profile. Replace turns it into decisions. Ledger makes every decision count.
Skill is Letron's system for capturing your creative instinct — it analyzes 20+ musical dimensions from the moments you tag, building a personal Style Profile used to filter Replace candidates.
Skill — Your creative instinct, captured
Good music comes from taste. Taste is hard to describe. Skill is how Letron reads it.
How it works
- Tag melodic moments you love as Memory Points
- Letron analyzes 20+ dimensions: rhythm, interval patterns, harmonic tension, phrasing, and more
- Your Style Profile builds over time — every session makes it more accurate
- Export as .lsk to back up, share, or list on the Letron Skill Marketplace
What Skill changes
- Replace candidates are pulled from your Profile, not from a generic pool
- New sessions start from knowing your sound — not from scratch
- Your taste becomes something you can own, trade, and build on
Replace is Letron's melody decision engine — select any section, and it surfaces candidates tuned to your Skill Profile. Every adoption is logged to Ledger.
Replace — From stuck to decided
Every producer gets stuck. Replace doesn't guess your way out — it consults your Skill.
How it works
- Select any melodic section in the DAW Editor
- Letron searches the cloud melody library using your Style Profile
- Multiple candidates appear — play each one back
- Confirm your pick. The decision commits to Ledger instantly.
Replace surfaces options. You make the call. That distinction is exactly what makes your Ledger credible.
Ledger is Letron's append-only creation event log — every note edit, Replace selection, and undo is timestamped in sequence and exportable as a .llg file.
Ledger — The record that speaks for your work
"I made this" needs more than your word these days. Ledger gives you something to show.
How it works
- Every action is appended as an event: note edits, Replace selections, undos, session timestamps
- The log can't be altered retroactively — append-only by design
- Full Undo / Redo / Replay: step back through your creative process at any point
- Export as .llg — your complete creation evidence file
- .llg breaks down human decisions vs. AI-assisted selections
What's inside a .llg
- Total event count and full timeline
- AI-assisted events (Replace adoptions) vs. manual edits
- Edit sequences with timestamps
- Ready to attach to a distribution submission or label review
The .llg file is a creation process documentation aid. It is not a legal determination of copyright ownership. Copyright is ultimately determined by the relevant judicial authority.