The centre of the window is a live map of your mix: every linked track is a dot, yours is the orange one, and the dashed lines are the swarm's centre of gravity.
Put one Swarm on each track and give them all the same Link Slot. From that moment your tracks talk to each other while the music plays — and get out of each other's way on their own. No master instance, no analysis pass, no automation lanes: just separation, alignment, cohesion and pan spread, applied by every track at once, exactly like a flock of birds keeping its shape.
The centre of the window is a live map of your mix: every linked track is a dot, yours is the orange one, and the dashed lines are the swarm's centre of gravity.
Every mix hits the same wall. The guitar and the keys fight over the same frequencies, the vocal disappears the moment the chorus lands, and you spend the afternoon drawing automation, notching EQs and patching sidechains just to keep everything audible. Swarm gives each track four simple rules and lets them sort it out between themselves, in real time, while you listen.
One Intensity knob rides all four at once. Start at 100%. Pull it down for something almost subliminal, push it to 300% if you want to hear the swarm clearly. Turn it to 0 and you'll hear exactly what it was doing.
This is the plugin's own central view. Each dot is a track, placed by its tone (left to right: dark to bright) and its level (bottom to top: quiet to loud). Watch the pile in the low-mids when the swarm is off — that pile is the masking. Switch it on and the tracks push each other apart and settle onto a common level, all by themselves.
In the plugin, your own instance is the orange dot, the others trail their paths behind them, and the dashed cross is the swarm's centre of gravity. Two dots drifting apart is Separation doing its job. A dot climbing to join the others is Alignment. It's the rare plugin that shows you why it's doing what it's doing.
It isn't a mastering plugin and it isn't a magic button. It's a mixing assistant that works while you work.
| Formats | VST3 · Audio Unit (macOS) · CLAP |
| Platforms | Windows 10/11 x64 · Linux x86-64 · macOS 10.13+ (universal, Intel & Apple Silicon) |
| Channels | Stereo in / stereo out |
| Swarm size | Up to 32 instances per Link Slot, 5 independent slots per session |
| Inter-instance link | Lock-free shared memory — no sidechain bus, no routing, works across plugin formats |
| Metering | In / out / gain reduction, crest factor, and short-term LUFS (ITU-R BS.1770, 3 s window) |
| Presets | 5 factory presets + user presets, A/B compare, 20-step undo |
| Parameters | Automatable in VST3, AU and CLAP hosts |
| Framework | Built with iPlug2 — open-source C++ audio plugin framework |
| License | Perpetual, all your machines, free updates. Separate key from the other XeniAudio plugins. |
The demo is the full plugin — every force, every preset, your settings saved with the session. The only limit is that the audio mutes for 5 seconds every minute, with fades so it never clicks. No sign-up required.
The installer is not yet signed with an Apple Developer ID, so macOS will block it on first open with messages like "cannot be opened because it is from an unidentified developer" or "could not verify [the file] is free of malware".
.pkg in Finder →
Open
Until the bundle is Developer-ID signed, Logic's hardened runtime can refuse to load the unsigned AU. As a workaround, ad-hoc sign it and clear the AU cache from Terminal:
sudo codesign --force --deep --sign - /Library/Audio/Plug-Ins/Components/Swarm.component
killall -9 AudioComponentRegistrarthen reopen Logic and rescan.
Launch price until August 17th — then €39. One license, all formats, all platforms, all your machines, forever.