Ambi Effect Delay

s3g Ambi Effect Delay 64 projects a complete first- through seventh-order ACN/SN3D field onto an Icosa12, Dodeca20, or Sphere24 listener body, then delays each pickup independently. Per-pickup time and feedback trims provide local control, while macro SPRD and DEV create coherent multi-point relationships.

Workflow

Insert the effect after an ambisonic source and match ORDER to the field.
Follow it with an ambisonic decoder. Additional Ambisonic effects may be placed before the decoder when their supported order and channel count match the field.
Start with BODY: AUTO, LOCAL, moderate feedback, and a short enough time to identify the directional repeats.
Raise SPRD for an ordered delay fan, then add DEV for less regular timing.
Use the meters to select active pickups and refine time or feedback on the two rails.
Introduce CROSS, DIFFUSE, or ROAMING with AMT after the timing relationship is established.
Engage the directional mask when the repeats should occupy one region. Lower DRY when the complementary region should be attenuated rather than merely uneffected.

Signal Flow

1OA-7OA ACN/SN3D field
-> unchanged encoded field ----------------------------+
|                                                       |
+-> decode Icosa 12 / Dodeca 20 / Sphere 24 pickups   |
    -> per-pickup OLA delay time, feedback, and tone    |
    -> Local / Cross / Diffuse / Roaming topology      |
    -> wet-mask interpolation + outside dry level      |
    -> subtract original and re-encode correction ------+
                                                        |
                           dry field + correction -> MIX -> OUT

The delay does not process HOA channels as unrelated lanes. It decodes the selected body, runs one overlap-add fractional delay per pickup, routes the delayed pickup signals through the topology, and re-encodes only the resulting correction. Material outside the pickup subspace therefore remains available on the original-field path.

The active-order HOA input is copied to the original-field path and decoded at the selected auditory body.
Independent pickup delays apply effective time, feedback, and feedback tone before topology routing. Time changes hold the existing read tap while a second tap moves, then overlap-add the pair through a complementary 35 ms window.
The directional mask chooses between the routed delay and the outside-region dry level at each pickup.
The original pickup signal is subtracted, the correction is re-encoded, and MIX scales it against the unchanged field before OUT.

Order and Auditory Body

Order	Active channels	AUTO body
1OA-2OA	4-9	ICOSA 12
3OA	16	DODECA 20
4OA-7OA	25-64	SPHERE 24

AUTO selects the body shown above. Every order is deliberately upscaled to at least twelve pickup directions; ICOSA 12, DODECA 20, and SPHERE 24 can also be selected directly. Settings for all twenty-four pickups remain stored and automatable when a smaller body is active.

Controls

Control	Function
ORDER / BODY	Selects the active HOA order and `AUTO`, `ICOSA 12`, `DODECA 20`, or `SPHERE 24` pickup body.
TIME	Sets the global delay time from `5` to `2000 ms`. Automation uses dual-tap overlap-add transitions rather than a continuously moving read head, avoiding zippering and continuous Doppler glide.
PICKUP 01-24 TIME TRIM	Offsets one pickup exponentially around the global time, from shorter to longer delays.
FEEDBACK	Sets the common repeat level up to `88%`.
PICKUP 01-24 FEEDBACK TRIM	Adds or subtracts feedback at one pickup, with the result constrained to the stable range.
TONE	Moves the feedback-path low-pass from dark repeats toward an open high-frequency response.
SPRD	Orders delay time across the active body and applies a smaller complementary feedback relationship.
DEV	Adds stable irregular offsets. With spread, deviation, and pickup trims at zero, every point has the same time and feedback.
TOPOLOGY / AMT	Routes delayed pickup signals locally, to opposites, through nearest-neighbor diffusion, or around a roaming body path.
RATE	Sets the `ROAMING` traversal rate from `0.005` to `2 Hz`.
MIX	Scales the re-encoded correction against the unchanged input field.
MASK / AZ / EL / WIDTH	Places and shapes the directionally wet delay region.
MASK CURVE	Moves from a soft directional falloff through the original response at midpoint to a much tighter effect island at the upper end.
DRY	Attenuates the original signal outside the wet region from unity at `0%` down to `-100% FX ONLY`. The negative endpoint leaves only the masked effect island when `MIX` is fully wet.
OUT	Applies final gain from `-60` to `+12 dB`.

Pickup Editor, Meters, and Camera

Click a numbered pickup, then drag the TIME - / TIME + and FB - / FB + rails below the body. Double-click a rail to reset that value, or double-click a pickup to reset both. The readout reports the selected pickup's effective time and feedback after macro relationships and manual trims.

Every smaller pickup point has a listener-style radial pre-delay energy halo over a -60 dB range. The halo expands and brightens with incoming energy, while the marker ticks show the effective macro relationship after SPRD, DEV, and local trim. The selected point also shows the active Local, Cross, Diffuse, or Roaming hearing route; outline brightness follows directional wet-mask gain.

Use TOP, SIDE, and 3/4 for standard views. Click-drag empty field space to orbit freely. Camera state is saved with the plugin, while pickup and rail gestures remain dedicated to parameter editing.

Directional Dry/Wet Mask

MASK: OFF applies the delay across the whole selected body. Raising it concentrates the processed target around AZ/EL; WIDTH controls its angular footprint while CURVE controls the softness of the boundary. Outside that island, DRY: 0% preserves the original pickup signal and negative values attenuate it until -100% FX ONLY removes it from the body correction subspace. Because MIX blends the correction with the original HOA field, complete outside-region removal requires a fully wet mix.