SPC Lumen Relay
Split the spectrum. Rack anything on every band.

“A multiband rack for your whole plugin folder.”
SPC Lumen Relay splits your signal into two to eight spectral bands — draggable crossovers, zero-latency recursive LR4 or linear-phase FIR, your choice — and then does something no ordinary splitter does: it gives every band its own mixer track with a ten-slot serial FX rack that hosts other CLAP plugins inside the band. Compress just the mids with your favourite compressor, saturate only the Ruby band, chorus the Azure one — no external mixer routing required, with full latency compensation aligning every nested chain automatically. Each hosted plugin opens its real editor in a movable, minimizable child window with state saved and restored inside your project. The effects browser scans your installed CLAP effects with exact identification and paging, and the racks speak fluent SPC — the whole Spectral Colors line nests happily. Prefer the classic workflow? Eight stable Direct Outs route any band to host mixer tracks instead, and the default Internal Mix keeps bus 1 as the full sound so nothing needs routing to make sound. Named bands with per-band trim, mute, solo and phase, a routing inspector, twelve saved semantic UI themes from Dark to Game Boy, and CPU/GPU display settings complete the console.
Available now — a one-time purchase, yours to keep.

Highlights
- 2–8-band spectral splitter with draggable crossovers
- Zero-latency recursive LR4 or linear-phase FIR splitting
- Eight internal band mixer tracks — ten serial nested-CLAP slots each
- Host any installed CLAP effect inside a band, real editor in a child window
- Automatic latency-aligned PDC across every nested chain
- Effects browser with exact plugin identification and paging
- Eight optional stable Direct Outs for classic host-mixer routing
- Internal Mix default — makes sound with zero routing setup
- Twelve saved semantic UI themes, per-band trim/mute/solo/phase
At a glance
- Format
- CLAP audio effect (64-bit)
- OS
- Windows 10 / 11
- Host
- Any CLAP host — FL Studio 21.2+, Bitwig, Reaper…
- Version
- 0.4.2
Latest updates
Actively developed — recent fixes and improvements:
- Store release hardening — parameter and state handling verified against the official CLAP validator, so every host restores your session identically.
- Effects-only discovery with exact plugin identification and paging — a 52-effect installed scan verified clean.
- Hosted plugin editors became movable, minimizable, closable and reopenable top-level windows.
- Twelve saved semantic UI themes, from Dark and Cyberpunk to Sand and Game Boy.
- The nested rack — eight internal band mixer tracks with ten serial CLAP slots each, child editors, state save/restore, latency-aligned PDC and the no-routing Internal Mix default.
Learn the technique
Not sure if this is the tool you need?
These free guides explain the job SPC Lumen Relay does — read them first, then decide. No sign-up, no video, just the technique.
Made to be played
Every knob morphs the sound.
SPC Lumen Relay is built for real-time sound design. Turn a control and the whole signal reacts at once — spectral colour, granular texture and modulation respond live, right in your DAW. Nothing is baked in: every parameter is fully automatable and MIDI-mappable, so you can draw evolving movement, morph a vector-scope signal, and lock in a one-of-a-kind sound no preset could give you.
Get SPC Lumen RelayInside the plugin
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