intellijel/sealegs

Sealegs

Intellijel

Multi-Modeled Stereo Character Delay with Reverb modeling tape, bucket brigade, and digital delay circuits, with built-in modulator, filters, reverb, and extensive CV control.743

Capabilities 3

LFOlfo
Internal modulator with Wow & Flutter, Envelope Follower, and 7 morphing waveshapes. Available at MOD OUT jack at full amplitude.743
Reverbreverb
Built-in lush 1970s-inspired reverb (FOG) with 3 insert positions and controllable decay.743
Stereo Delaystereo-delay
Three modeled delay types (TAPE, BBD, DIGI) with true stereo L/R buffers and three stereo configurations (PONG, T:W, L/R). Up to 6s (L) and 8s (R) of delay time.743

Jacks 16 — 13 in / 3 out

NameSignalVoltageDescription
Inputs (13)
AUX CV INcv—Assignable CV input; destination selected via ALT+AUX DEST button. Has a dedicated attenuverter.743
Assignable destinations mirrors TAP TEMPO/AUX DEST
DRIVEModulates DRIVE at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Magenta).743 NOISEModulates NOISE at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Yellow).743 MODVaries the MOD waveforms at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (White).743 FOGModulates FOG at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Green).743 MIXModulates MIX at a depth set by the AUX CV attenuverter. Mirrors the AUX DEST selection (Blue).743
CLK INclock—External clock source for syncing DELAY TIME and/or MOD RATE when DELAY SYNC or MOD SYNC is enabled.743
COLOR CV Incv—743
FB CV INcv—743
FREEZE INgate—High gate enables freeze; low gate disables freeze.743
HIGHPASS FREQ CV Incv—743
IN Laudio—Left channel audio input. Used as mono input when processing a mono signal; IN R is then normalled to IN L.743
IN Raudio—Right channel audio input. Normalled to IN L when unpatched.743
LOWPASS FREQ CV Incv—743
MOD DEPTH CV INcv—743
MOD RATE CV INcv—743
TIME/L CV INcv—CV input for modulating delay time. Positive voltages increase time, negative voltages decrease it. Scaled by TIME CV attenuverter.743
WIDTH/R CV INcv—743
Outputs (3)
MOD OUTcv—Outputs the full-amplitude MOD waveform CV. Not affected by MOD DEPTH slider. Can be used to modulate external modules or self-patch into other Sealegs parameters.743
OUT Laudio—743
OUT Raudio—743

Parameters 29

NameTypeRangeBehavior
AUX CV attenuverterknob—Scales and optionally inverts the CV sent into the AUX CV IN jack. Fully CW = full range; noon = fully attenuated (no effect); fully CCW = full inverted range.743
COLORfader—Adds model-dependent sonic artifacts: TAPE = tape drag, degradation & dropouts; BBD = grit from companded noise and clock instability; DIGI = bit-crushing and sample rate reduction.743
COLOR CV attenuverterknob—Scales and optionally inverts the CV sent into the COLOR CV jack. Fully CW = full range; noon = fully attenuated; fully CCW = full inverted range.743
DELAY SYNC/FB CROSSbutton—STANDARD: press to turn DELAY SYNC on/off; when lit orange, delay time syncs to clock or tap tempo. ALT (hold ALT): turns Crossed Feedback on/off; when lit blue, feedback from left delay feeds right input and vice versa. Long-press (>1 sec) clears the delay buffer.743
DRIVEknob—STANDARD: combination input level and overdrive control. Fully CCW attenuates input to zero; at noon is unity gain; CW from noon adds gain or overdrive. ALT (hold ALT button): input trim control — CCW is 0.5x, noon is 1x (default), CW is 2.5x.743
FBfader≤160%Sets feedback amount. Short times (<20ms) create flange; up to 50ms creates chorus/doubling; >50-60ms creates discrete echoes or looping. Goes up to 160% for runaway feedback.743
FB CV attenuverterknob—Scales and optionally inverts the CV sent into the FB CV IN jack. Fully CW = full range; noon = fully attenuated; fully CCW = full inverted range.743
FOGknob—STANDARD: controls the level of the built-in fog (reverb). ALT (hold ALT button): varies the FOG DECAY time.743
FOG/DRIVE POSITIONswitch—STANDARD: 3-position switch selecting where FOG (reverb) is inserted in the signal chain: IN (before delay), DLY (after delay, wet only), MIX (post-mix, affects wet and dry). ALT (hold ALT): selects where the DRIVE circuit is inserted in the signal chain using the same three positions.743
FREEZE/ALTbutton—Tap to toggle delay freeze on/off. When frozen (lit cyan), no new data is written to the buffer. Hold down to access ALT functions on other controls.743
HIGHPASS FREQfader—Sets the highpass filter cutoff in the feedback loop. Frequencies below the cutoff are attenuated at 6dB/oct. Higher slider position removes more low frequencies. When frozen, filter moves outside the feedback loop.743
HIGHPASS FREQ CV attenuverterknob—743
LOWPASS FREQfader—Sets the lowpass filter cutoff in the feedback loop. Frequencies above the cutoff are attenuated at 6dB/oct. Lower slider position removes more high frequencies. When frozen, filter moves outside the feedback loop.743
LOWPASS FREQ CV attenuverterknob—743
MIXknob—Sets the wet/dry mix. Fully CCW sends only dry signal; fully CW sends only wet signal; intermediate positions blend the two.743
MODknob—743
MOD DEPTHfader—Sets the amount of delay time modulation from the internal MOD wave. Does not affect the amplitude of the MOD OUT jack signal.743
MOD DEPTH CV attenuverterknob—Scales and optionally inverts the CV sent into the MOD DEPTH CV jack. Fully CW = full range; noon = fully attenuated; fully CCW = full inverted range.743
MOD RATEfader0.1Hz – 40HzSets oscillation/vacillation rate for LFV and oscillating waveforms. For envelope followers, sets response rate. For Wow & Flutter, crossfades between wow (low) and flutter (high). Can be synced to clock or tap tempo.743
MOD SYNC/MOD PHASEbutton—STANDARD: press to turn MOD SYNC on/off; when lit orange, MOD RATE syncs to clock or tap tempo. ALT (hold ALT): inverts the phase of the internal MOD WAVE for the right channel's delay time modulation.743
MODELswitch—3-position switch selecting the delay model: TAPE (top), BBD (mid), DIGI (bottom).743
NOISEknob—STANDARD: varies the amount of noise injected into the signal path. ALT (hold ALT button): changes the NOISE MODE — fully CCW is hiss pre-delay; turning CW introduces crackle reaching full at noon; past noon introduces post-delay hiss.743
STEREO CONFIGswitch—3-position switch: PONG (inputs summed, delays in series), T:W (parallel with right time offset from left), L/R (fully independent left and right delay times).743
TAP TEMPO/AUX DESTbutton—STANDARD: tap repeatedly to set tempo for DELAY TIME and MOD rate sync. ALT (hold ALT button): cycles through 5 destination options for the AUX CV IN jack (DRIVE, NOISE, MOD, FOG, MIX).743
Assignable destinations
DRIVE743 NOISE743 MOD743 FOG743 MIX743
TIME CV attenuverterknob—Scales and optionally inverts the CV sent into the TIME CV jack. Fully CW = full range; noon = fully attenuated; fully CCW = full inverted range.743
TIME RANGEswitch—3-position switch: SHORT (3.125–93.75 ms), MED (50 ms–1.5 s), LONG (200 ms–6 s) when unsynced. When synced, selects note division ranges from 64th-to-16th note (SHORT), 16th-to-quarter note (MED), or quarter-to-whole note (LONG).743
TIME/Lfader—Sets the delay time (left channel, or primary). Range depends on TIME RANGE switch: SHORT 3.125–93.75 ms, MED 50 ms–1.5 s, LONG 200 ms–6 s. When synced, selects note divisions. In PONG/T:W stereo config, sets the primary delay time; in L/R config, sets left channel time directly.743
WIDTH CV attenuverterknob—Scales and optionally inverts the CV sent into the WIDTH CV jack. Fully CW = full range; noon = fully attenuated; fully CCW = full inverted range.743
WIDTH/Rfader0% – 33%In PONG/T:W config: adds a 0–33% offset to the primary delay time. In L/R config: sets right channel delay time directly (same range as TIME/L).743

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. Original darker drive can be restored by holding MOD SYNC on boot.743
1.22024-05-13Gain staging updates: reduced signal attenuation for more balanced MIX control and louder output; adjusted Drive processor gain in all 3 Drive positions; raised output limiter threshold; wider detent for 1x input trim. New Send/Return Mode (hold DELAY SYNC on boot): dry signal not passed through, MIX controls wet level only.743
1.12023-11-22New DRIVE position switch: hold ALT and toggle FOG/DRIVE POSITION switch to select IN (beginning of chain, default), DLY (wet side only), or MIX (post-mix, affects wet and dry, has minimum level). Setting saved across boots. FREEZE is now clickless on all modes.743
1.02023-08Initial release.743

References 2

  1. [743]
    Intellijel Sealegs Manual v1.3manual
    source 743 canonical ↗ archived ↗
    ● verified 2026-05-22
  2. [744]
    Intellijel Sealegs product pageproduct_page
    source 744 canonical ↗ archived ↗
    ● verified 2026-05-22