Every track
on one map.
Your library runs deep.
Spektra is a desktop app for DJs. It reads the audio of every track you own and plots your whole library as one map — so you can find music by how it sounds, not just by tags.
The structure
is already there.
Your library already has a shape.It’s defined by how your music sounds — something a tag was only ever a rough stand-in for. Most of it remains undiscovered. Spektra reads the audio and makes that shape something you can move through.
What you do with it is up to you. Discover. Organize. Plan.
Watch it
work.
The whole workflow, end to end — read the map, drop anchors, plot a course, audition it, save it.
Every star
is a track.
Position, size, and brightness are all measurements from spectral analysis.
- Position
- BPM across, Energy up. Tracks with no detected tempo sit in the NO BPM gutter on the far left.
- Size
- Bass Density. Heavier low end reads larger.
- Brightness
- Color. A track’s tonal character, dark and muted through bright and airy.
What the measurements are
Power, Bass Density and Color come from offline spectral analysis. Energy blends those measurements with an audio embedding. That’s what makes “close” a measurable distance and not a hunch — a useful approximation, not a verdict.
First run
First run reads every file on your drive. The galaxy forms as it goes; embedding is the last pass. None of it leaves your machine.
About what leaves your machine: Except a check for updates, and anything you choose to send. What the app sends
Drop anchors.
Plot a course.
Three moves on the same map. Filter. Anchor. Plot.
Narrow
OptionalSix filter groups cut the pool.
Power, Bass Density, Color, BPM, and Times Played are dual-handle ranges drawn over a histogram of your actual library — so you can see what you’re cutting before you cut it. Also filter by your track metadata.
Anchor
Click a star, or search by name in Sound Like.
Up to five tracks. Each takes a color and tints its region of the map, so you can see each anchor’s neighborhood before you commit to anything.
Plot
Set a track count, hit Plot Course.
The route draws across the field with numbered waypoints, the field dims, and the Course list fills the right rail — grouped by anchor and reorderable. Audition tracks.
Hear it
before you decide.
Cue any star on the canvas, or any row in a Course, and it plays in the right rail. To hear a whole Playlist, the Recon Deck plays it as a run of clips — 15, 30 or 60 seconds of each track, or all of it — crossfading from one into the next. Full waveform, playhead, Sonic Barcode. You hear where the tracks connect, and where they clash, before you take them to the decks.
Spektra measures, doesn’t generate.
Spektra reads the audio to map what you already own. No models writing your sets, no prompts, nothing invented. The machine learning under the hood is the kind of technique a mastering engineer uses to characterize audio — applied to your crate.
Bought once. Yours forever. Nothing leaves your machine.
No subscription, no cloud, no account, no telemetry. Spektra works on an airplane, and it works in five years whether or not I’m still here.
About what leaves your machine: Except a check for updates, and anything you choose to send. What the app sends
Who makes Spektra?The playlist is the exit, not the point.
Spektra exports one because that’s the fastest way into the DJ software you already use. What matters is what you turn up on the way there.
- Import
- Mixxx · Rekordbox (local audio files)
- Export
- M3U8
- Platforms
- macOS · Windows · Linux
The track you forgot?
It's already on your drive.
All platforms. Runs on your machine. No subscription, ever.