Built for the spacebetween exports
Concerto is a music collaboration platform for works in progress. I built it because the feedback on a mix was turning into noise: requests were getting lost, people were getting frustrated, and I got tired of it.
Why Concerto exists
Most music feedback gets lost in transit
I kept running into the same problem collaborating with the other songwriters and musicians in my community: mixes were sent in random group chats, reviewers' responsibilities were unclear, and notes were scattered and imprecise. By the time the next version was sent out, nobody was certain which comments were addressed, which version anyone was hearing, or what changed between the two. It was chaos, so I made something better.
Concerto replaces all those group chats and email threads with one place per song. Collaborators listen in the browser, leave comments attached to exact timestamps, and see the full version history in order. Comments become todos, todos get resolved, and each new version can say what it addresses. Nothing about that requires your collaborators to buy anything or install a DAW.
Concerto is deliberately not a DAW and not a distribution platform. It covers the middle: sharing drafts, collecting feedback, and keeping track of what changed. You keep making music in whatever tools you already use.
Feedback in context
Notes on a mix only mean something next to the sound they describe. Every comment in Concerto is pinned to a timestamp on the waveform, so nobody has to reconstruct what "around the second chorus" means three days later.
Versions that stay in order
A song is a sequence of bounces, not a single file. Concerto keeps every version of a song together with notes about what changed, so the history of a track is readable instead of scattered across a downloads folder.
Parts, not just the sum
Reviewers hear more when they can isolate what they are listening to. Upload stems or auto-split a track, and anyone you share with can mute, solo, and balance the parts in the browser with nothing to install.
Who makes it
I'm Robert, and Concerto is my project. It is developed and operated by my company, Archa Solutions, LLC — small and independent, which shapes the product in ways worth being explicit about: your work is private by default, you're in control of who can see it, and I do not sell or share user data with third parties. The subprocessor list names every vendor that touches your files, and the privacy notice covers what gets collected and how to have it deleted.
The business model is the simple one: you pay for the product, and that's it. There are no ads, no data sales, and no investors pushing for growth at your expense. The free plan is plenty for most work, the paid plan exists to keep the servers running, and the people you share with never need to pay anything to listen and leave feedback.
I also build SHED, a free practice app with stem separation, at shed.concerto.studio.
I want Concerto to work for you. If you hit an issue or have an idea for how it could be better, use the Feedback button in the app or send me a note (I read everything).