Concerto exists because we were making an album the way most people do: bounces in a shared folder, feedback in a group chat, lyrics in someone's Google Doc, and a running argument about which file was actually the latest. Every tool in that stack worked as designed. The collaboration still leaked everywhere, because none of those tools understand what a song in progress is.
A folder full of audio isn't a project
To a sync folder, your record is a pile of files. It doesn't know that three of those WAVs are the same song at different stages, that the PDF is the chord chart for one of them, or that the conversation about the bridge happened somewhere else entirely. So the knowledge that glues a project together (what changed, what's decided, what's still open) lives in people's heads and chat scrollback.
A purpose-built home for works in progress starts from the song's actual shape: projects hold songs, songs hold versions, and everything about a song lives on the song itself, from comments pinned to timestamps to attachments, todo lists, and album art. When someone joins the project next month, the context is just there.
The conversation belongs next to the audio
The single biggest difference from file sharing isn't storage. It's that feedback in Concerto happens on the music. Comments attach to timestamps on the waveform of a specific version. Replies keep clarifications with the original note. Voice memos let someone sing the part they mean. Resolved comments collapse so open questions stay visible. None of that has an equivalent in a sync folder, because a sync folder can't point at second 41 of anything.
Sharing that matches how music actually flows
Music collaboration has concentric circles: the band sees everything, the guest vocalist sees one song, the client hears the versions you choose to play them. Concerto models that directly. Workspaces give a team shared access to everything inside; individual projects, songs, or versions can be shared outward with exactly the people who need them. Viewers can listen and comment on free accounts, and they see only what you've shared, not the rest of your workspace.
What we're not claiming
Concerto doesn't replace your DAW, your distributor, or, honestly, your sync folder for the thousand other files in your life. It covers the space between DAW exports: sharing drafts, collecting feedback, and keeping the history straight. It's a focused tool built by people using it on their own records, and we'd rather do that one job well than gesture at doing everything.