A reverb voiced for worship.

Sanctum is a multi-algorithm reverb with 14 engines — from intimate rooms to cathedral tails, lush worship pads and shimmer. Freeze a pad, sculpt the low end, switch presets from a MIDI footswitch. Free.

macOS Audio Unitfreecoming soon

Space without the work

Worship space, without the work. Pick a mode, dial decay and mix — done.

Behind the simple panel is a true-stereo engine with early reflections, modulated diffusion, pitch shimmer and a feedback-delay-network core, tuned for vocals, keys, acoustic and electric.

14 reverb modes Hall, Plate, Spring, Shimmer, Room, Chamber, Cloud, Nave, Umbra, Swell, Chorale, Tape, Nonlinear, Reflections.

Freeze hold Capture an infinite pad while you keep playing dry on top — instant worship bed.

Frequency-split decay Independent low-end decay and crossover keep lows tight while the highs bloom.

Shimmer & Chorale Two tunable pitch voices for shimmer, and a harmonised choir/vox pad for worship.

20 presets + your own 20 factory presets across every mode, plus savable user presets.

MIDI & bypass tails Program Change picks presets; sustain → Freeze, CC → Mod/Mix. Bypass rings the tail out.

How it works

Intimate rooms. Cathedral tails. Frozen pads.

Close-up of the Sanctum mode display and knobs — The mode display

The nave of Wells Cathedral — Sanctum: Latin for a holy place

Pick a mode

14 voiced engines — Hall, Plate, Room, Chamber, Cloud, Nave, Umbra, Shimmer, Chorale and more. The knobs relabel to match each one.14 modes

Shape it

Decay, Pre-Delay, Tone and Mix get you 90% there. Sculpt the low tail with the LOW and X-OVER knobs so it never muddies the mix.4 knobs

Freeze & play

Hit Freeze to hold an infinite pad and keep playing over it. Or trigger Freeze and switch presets from a MIDI footswitch, live.MIDI

Free · no licence key neededMac · AU

Made for worship teams

From a tight vocal plate to an enormous cathedral, lush ambient pads and shimmer — Sanctum covers the modern worship palette, on stage and in the studio.

Intimate rooms. Cathedral tails. Frozen pads.— one reverb, voiced for worship.

Every mode, knob and MIDI mapping is in the guide.Read the Sanctum manual →

FAQ

What format is Sanctum?

A macOS Audio Unit (AUv3) effect. It runs in Logic Pro, GarageBand, MainStage and other AU hosts.

Is there a Windows / VST version?

Not yet — Sanctum is macOS-only for now.

How do I install it?

Open the Sanctum app once — it registers with macOS, then appears under JC Audio in your DAW's Audio Units. Free, no license key.

Can I control it from a MIDI footswitch?

Yes — MIDI Program Change selects factory presets, a sustain pedal (CC64) toggles Freeze, and CC1/CC11 map to Mod/Mix. Other parameters are host-mappable.

Is it really free?

Yes — Sanctum is completely free. We just ask for your email to send the download and the occasional update. Unsubscribe anytime.