The prep app for DJs
Solco listens to your collection: tempo, key, energy, mood and style. Rediscover forgotten tracks, build smart playlists or ask the AI assistant for suggestions. You shape the set. Solco handles the grids, tags and USB prep.
Your taste. Your collection. Your next set.
You already have the music.
Find what belongs together.
Solco is a desktop app for preparing your library before you play. Search your own collection, shape the playlists and review the results. Then take them to your DJ setup.
1Smart playlists
Describe the night and the playlist assistant proposes a folder of playlists from your own collection. Review it, change it and make it yours. Or save your own search as a smart playlist: new tracks that fit join automatically.
2Character
Narrow your library by tempo, key, genre, energy, mood or vocals. Find a calmer opener, a driving next track or something that changes the room. Solco analyses the sound on your computer, giving you another way into the music you already own.
3Dropped in
Point Solco at your music folders once. New files land in Recently added and Solco starts listening straight away. Copy or move, your call.
From rekordbox: playlists, folders, hot cues, memory cues, loops, ratings and colours. Beatgrids stay behind, because Solco grids every track itself. Your rekordbox library is only read, never changed.
4Beatgrid
Solco's local AI hears beats and bars in the audio itself. It locks onto a four-to-the-floor kick, finds the bars in a piano piece, and follows a live drummer through every tempo change, bar by bar. It gets almost every grid right: of the 9,434 tracks in my own library, 848 change tempo, and Solco asked me to check just 16 grids.
Real output, not a mock-up. Solco's analysis of four tracks from a DJ's library, drawn exactly as it comes out: every beat and bar line, and the tempo at each beat underneath.
How Solco finds beat grids, and how to fix oneWant grids like these on your own tracks?
Join the waitlist5Genre
House.
Disco.
It listens on your computer and hears what a track is, even when its tag is wrong or empty. Then it writes the genre tag, if you want.
6Tags and cover
Solco recognises each track by its audio fingerprint, finds it in MusicBrainz and Discogs, and proposes the right title, album, year and cover. Confident matches go in with one click. The rest wait for you, field by field.
7Duplicates
Solco recognises the same recording by its sound, even under another name in another folder. It keeps the copy in your library, shows exactly what goes, and asks first.
8On the USB
Plays on CDJs.
No rekordbox.
Pick your playlists, plug in a drive, and Solco writes the rekordbox USB format that Pioneer players read: the Device Library and OneLibrary, so older players and the CDJ-3000X both list your tracks. No laptop in the booth.
Your first export, step by stepWe timed both apps putting the same 493 already-analysed tracks on the same 250 GB SanDisk USB stick (FAT32) from a Mac mini M4; rekordbox 7.2.6; median of three runs.
Every track. Ready to play.
Want your next gig ready like this?
Join the waitlistTrust
Every analysis runs on your own computer, on the GPU when there is one. Your music is never uploaded.
Tags are written through a checked copy of the file, never edited in place.
Nothing on the USB is removed. The sets you played on it stay where they are.
Replace and erase are separate, named actions. They show exactly what goes and wait for you.
Imports from rekordbox, Apple Music and Traktor, and from a USB drive prepared by rekordbox.
Writes the USB drives Pioneer CDJ and XDJ players read, with both libraries, no rekordbox needed.
Mac (Apple Silicon or Intel), Windows and Linux.
Two looks
Drag across to compare.
Every time I dig for new music, I spend a whole day getting it ready to play. Beatgrids that don't line up, wrong genre tags, missing covers, duplicates. It all adds up. That's backwards.
I built Solco to spend less time on that admin and more time with the music. I still choose the tracks and shape the set. Now I want to make it useful for the way you play, too.
Carmine PaolinoDJ, and the maker of Solco
Questions
No. Solco writes the USB drive itself, in the rekordbox format Pioneer players read. If you still use rekordbox, Solco can import its library, and rekordbox keeps working as before. It is also much quicker at writing the drive: see the test, and how the export works.More in the help centre
For preparing your music, yes. Solco does the DJ library management, from beatgrids, keys and tags to duplicates and playlists, and writes the USB your CDJs and XDJs read, on macOS, Windows and Linux. It isn't for performing: you don't mix in Solco, you play from the USB on the players. If you still use rekordbox, both can add to the same drive, each keeping the other's playlists.More in the help centre
Yes. Your folders, playlists, cues, grids and tags stay exactly as you set them. Solco adds its readings next to yours. It writes two things into your files by itself: an ID tag, so it can follow a file you move, and its key, so your other apps and players show the same key. Turn key writing off, or put your files' own keys back, in Settings › Analysis. Every other tag waits for you. Do as much by hand as you like, or none of it.More in the help centre
Pioneer DJ and AlphaTheta players that read either library on a USB drive, because every drive Solco prepares gets both: the Device Library, which the CDJ-3000, CDJ-2000NXS2, XDJ-RX3 and older players read, and OneLibrary, which the CDJ-3000X, XDJ-AZ, OPUS-QUAD and OMNIS-DUO read. I have played Solco USBs on the CDJ-3000, CDJ-3000X, XDJ-RX3, CDJ-2000NXS2, CDJ-2000 and XDJ-1000MK2. Tell me what you play on when you sign up. Which player reads which library.More in the help centre
Playlists, folders, hot cues, memory cues, loops, ratings and colours. Beatgrids stay behind, because Solco grids every track itself. Your rekordbox library is only read, never changed.More in the help centre
No. Every analysis runs on your computer. The optional playlist assistant looks things up in your library step by step and proposes a plan, a folder of playlists you review before you create it, or a change to a playlist you already have, which you review before it is made. Sending it a message shares your request, the conversation, and the names and details of the tracks and playlists it looks up with Solco's service. Never audio or file paths.More in the help centre
The beta is free, and your licence key renews itself while the beta lasts. New builds with fixes come out often. The full release’s prices are in the terms of sale.More in the help centre
A Mac (Apple Silicon or Intel) with macOS 13.4 or later, Windows and Linux. On an Intel Mac, analysis runs on the processor, so it takes longer. Solco on Linux.More in the help centre
Solco is early, and it works only with a licence key made for you. Join the waitlist, and when there is a seat your personal key comes by email. Activate it once while online, on up to three of your computers; after that Solco works offline, and renews your key by itself while the beta lasts. I let DJs in small groups, read every message, and ship updates often. Keep a backup of your music, as you always should.More in the help centre
The name
Solco /ˈsol.ko/ is Italian for the groove of a record, and for the furrow ploughed before sowing.
Tracciare il solco means to prepare the way. So the music can grow, and you can play.
Join the free private beta for Mac (Apple Silicon or Intel), Windows and Linux. Confirm your email, and I’ll send your personal key when your place is ready. No card needed.
Join the waitlist