intellijel/sealegs

Sealegs

Intellijel

Multi-Modeled Stereo Character Delay with Reverb modeling three delay circuit types: Tape, Bucket Brigade, and Digital, with onboard modulation, filters, reverb, and extensive CV control.752

Capabilities 3

LFOlfo
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Reverbreverb
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Stereo Delaystereo-delay
True stereo delay with separate L/R buffers modeling tape, BBD, and digital delay circuits with per-model color controls and up to 6s (L) / 8s (R) delay time.752

Jacks 16 — 13 in / 3 out

NameSignalVoltageDescription
Inputs (13)
AUX CV INcv—Assignable CV input with five destination options (DRIVE, NOISE, MOD waveform, FOG, MIX) set via ALT + AUX DEST button.752
Assignable destinations mirrors TAP TEMPO / AUX DEST
DRIVEModulates DRIVE at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Magenta).752 NOISEModulates NOISE at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Yellow).752 MODVaries the MOD waveforms at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (White).752 FOGModulates FOG at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Green).752 MIXModulates MIX at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Blue).752
CLK INclock—Clock input for syncing delay time and/or mod rate when DELAY SYNC or MOD SYNC buttons are lit.752
COLOR CV Incv—752
FB CV INcv—752
FREEZE INgate—High gate enables freeze; low gate unfreezes the delay buffer.752
HIGHPASS FREQ CV Incv—752
IN Laudio—Left channel audio input. When processing mono, use this jack as the mono input and leave IN R unpatched.752
IN Raudio—Right channel audio input. Normalled to IN L when unpatched.752
LOWPASS FREQ CV Incv—752
MOD DEPTH CV INcv—752
MOD RATE CV INcv—752
TIME/L CV INcv—CV input for modulating delay time. Positive voltages increase time; negative voltages decrease it. Scaled by TIME CV attenuverter.752
WIDTH/R CV INcv—752
Outputs (3)
MOD OUTcv-10V to 10VCV output of the MOD WAVE at full amplitude (unaffected by MOD DEPTH slider). Can be used to modulate external modules or self-patched into other Sealegs parameters.752
OUT Laudio—752
OUT Raudio—752

Parameters 29

NameTypeRangeBehavior
AUX CV attenuverterknob—Attenuverter for AUX CV IN. Fully CW = full CV range; noon = fully attenuated (no effect); CCW from noon inverts the CV with increasing level until fully CCW = full inverted range.752
COLORfader—Adds model-specific sonic artifacts: TAPE = tape drag, degradation & dropouts; BBD = companded noise, clock instability; DIGI = bit-crushing and sample rate reduction.752
COLOR CV attenuverterknob—752
DELAY SYNC / FB CROSSbutton—STANDARD: Toggle DELAY SYNC on/off (lit orange when synced). ALT (hold ALT): Toggle Crossed Feedback on/off (lit blue when active, crossing left delay feedback into right delay input and vice versa). Long-press (>1 sec) clears current delay buffer.752
DRIVEknob—STANDARD: Combination input level and overdrive control. Fully CCW = fully attenuated. At noon = unity gain. Clockwise from noon adds gain or overdrive. ALT (hold ALT button): Input trim control; noon = 1x, fully CCW = 0.5x, fully CW = 2.5x.752
FBfader≤160%Sets feedback level. Short delays create flanging (<20ms), medium create chorus/doubling (~50ms), longer create discrete echoes or loops. Goes up to 160% for runaway feedback.752
FB CV attenuverterknob—752
FOGknob—STANDARD: Controls the level of the built-in fog (reverb). ALT (hold ALT button): Varies the FOG DECAY time.752
FOG/DRIVE POSITIONswitch—STANDARD: Selects where the FOG circuit is inserted in the signal path (IN, DLY, or MIX). ALT (hold ALT button): Selects where the DRIVE circuit is inserted in the signal path (IN default, DLY, or MIX).752
FREEZE / ALTbutton—Tap to toggle delay freeze on/off; when frozen (lit cyan), no new data is written and the buffer loops. Hold to use as ALT modifier for secondary functions on other controls.752
HIGHPASS FREQfader—Sets highpass filter cutoff frequency at 6dB/oct. Sits inside the feedback loop (unless frozen). Higher slider position removes more low frequencies from the signal.752
HIGHPASS FREQ CV attenuverterknob—752
LOWPASS FREQfader—Sets lowpass filter cutoff frequency at 6dB/oct. Sits inside the feedback loop (unless frozen). Lower slider position removes more high frequencies from the signal.752
LOWPASS FREQ CV attenuverterknob—752
MIXknob—Sets the wet/dry mix. Fully CCW = dry only; fully CW = wet only; middle positions blend dry and wet.752
MODknob—Selects MOD waveform shape. CCW to CW: WOW & FLUTTER (discrete), EF- (discrete), EF+ (discrete), LFV1, SAMPLE & HOLD, SQUARE, SINE, SAW, RAMP. Adjacent LFO shapes crossfade into one another unless ALT is held. ALT mode selects waveforms directly without crossfading.752
MOD DEPTHfader—Sets how much the MOD waveform modulates the internal delay time. Does not affect the amplitude of the signal at the MOD OUT jack.752
MOD DEPTH CV attenuverterknob—752
MOD RATEfader0.1Hz – 40HzSets the modulation rate. For LFO waveforms: sets oscillation rate. For envelope followers: sets response rate. For Wow & Flutter: crossfades between wow (low) and flutter (high). Free-running range 0.1–40Hz; can sync to clock.752
MOD SYNC / MOD PHASEbutton—STANDARD: Toggle MOD SYNC on/off (lit orange when synced). ALT (hold ALT): Toggle phase inversion of the internal MOD WAVE for the right channel's delay time.752
MODELswitch—Three-position switch selecting delay model: TAPE (tape-based), BBD (bucket brigade), or DIGI (digital). Each model has unique character shaped by the COLOR slider.752
NOISEknob—STANDARD: Varies the amount of noise injected into the signal path. ALT (hold ALT button): Changes the NOISE MODE — fully CCW is hiss before the delay; clockwise introduces crackle, reaching full crackle at noon; past noon introduces post-delay hiss.752
STEREO CONFIGswitch—Three-position switch: PONG = L/R summed to mono, delays in series; T:W = parallel delays with left and right inputs independently feeding each delay line, right offset by 0–33%; L/R = independent left and right delay times set by TIME/L and WIDTH/R sliders respectively.752
TAP TEMPO / AUX DESTbutton—STANDARD: Tap tempo button for DELAY TIME and MOD rate. ALT (hold ALT button): Cycle through 5 destination options for the AUX CV IN jack.752
Assignable destinations
DRIVE752 NOISE752 MOD752 FOG752 MIX752
TIME CV attenuverterknob—752
TIME RANGEswitch—Three-position switch governing delay time range. Un-synced: LONG=200ms-6s, MED=50ms-1.5s, SHORT=3.125ms-93.75ms. Synced: LONG=quarter to whole note, MED=sixteenth to quarter note, SHORT=sixty-fourth to sixteenth note.752
TIME/Lfader—Sets the primary delay time. Range depends on TIME RANGE switch. Can be synced to clock or tap tempo. In PONG/T:W modes sets the primary delay time; in L/R mode sets the left channel delay time directly.752
WIDTH CV attenuverterknob—752
WIDTH/Rfader—In PONG or T:W modes: adds a 0–33% offset to the primary delay time. In L/R mode: directly sets the right channel delay time. Offset range at bottom is 0% and at top is 33%.752

Firmware history 4 versions

VersionReleasedNotes
1.32025-11-24Hiss is now stereo and a bit more chill; Crackle is less dense. Drive stage is brighter sounding by default. The original darker drive can be restored by holding SYNC-MOD on boot (LEDs light Blue for Dark, Cyan for Bright).752
1.22024-05-13Gain staging updates: reduced attenuation on signals through Sealegs making MIX more balanced and output louder; adjusted Drive processor gain staging in all 3 Drive positions; raised output limiter threshold. Wider detent for input trim at 1x noon. New Send/Return Mode (hold DELAY SYNC on boot): DRY signal not passed through, MIX controls WET level only.752
1.12023-11-22New DRIVE position switch: can move DRIVE circuit to IN (default, beginning of chain), DLY (wet side only), or MIX (post-mix, affects both wet and dry) by holding ALT and toggling FOG/DRIVE POSITION switch. Setting saved across boots. FREEZE is now clickless on all modes.752
1.02023-08Initial release.752

References 2

  1. [752]
    Intellijel Sealegs Manual v1.3manual
    source 752 canonical ↗ archived ↗
    ● verified 2026-05-22
  2. [753]
    Intellijel Sealegs product pageproduct_page
    source 753 canonical ↗ archived ↗
    ● verified 2026-05-22