strymon/starlab

StarLab

Strymon

Time-warped reverberator combining lush stereo reverb (sparse/dense/diffuse), pre-delay/echo, Karplus-Strong string synthesis, LFO modulation, shimmer, glimmer, and extensive CV control in 28HP.741

Capabilities 4

Delaydelay
DELAY/KARPLUS section provides pre-delay and digital delay with feedback, tap tempo, clock sync, and optional ECHO ON routing to WET output.741
LFOlfo
LFO with 6 waveshapes (triangle, square, ramp, saw, random, envelope) targeting delay time, SIZE/PITCH, or filter. Clock-syncable via LFO CLK IN. External LFO input with DEPTH attenuverter.741
Physical Modelingphysical-modeling
Karplus-Strong mode provides monophonic delay-based string synthesis with pluck and bow triggering, CV pitch control at 1V/oct over 4 octaves, and dynamic damping.741
Reverbreverb
Multi-textural stereo reverb with three structures (sparse/dense/diffuse), adjustable decay, size/pitch control, infinite freeze, shimmer pitch shifting, and glimmer harmonic enhancement.741

Jacks 21 — 19 in / 2 out

NameSignalVoltageDescription
Inputs (19)
CLEAR CVtrigger0V to 5V741
DECAY CVcv-5V to 5V741
DEPTH CVcv-5V to 5V741
ECHO ON CVtrigger0V to 5V741
EXT LFO INcv-5V to 5V741
FAVORITE CVtrigger0V to 5V741
FEEDBACK CVcv-5V to 5V741
HIGH DAMP CVcv-5V to 5V741
IN GATE CVgate0V to 5V741
INFINITE CVtrigger0V to 5V741
INTERVAL CVcv-5V to 5V741
LEFT INaudio—741
LFO CLK INclock0V to 5V741
RIGHT INaudio—741
SHIMMER CVcv-5V to 5V741
SIZE/PITCH CVcv-2V to 2VIn reverb mode: modifies SIZE/PITCH at 1V/octave, range +/-2V. In Karplus-Strong mode: tunes string over 4 octaves at 1V/oct, range 0-4V.741
SPEED CVcv-5V to 5V741
TAP/TRIG CVclock0V to 5V741
WET CVcv-5V to 5V741
Outputs (2)
LEFT OUTaudio—741
RIGHT OUTaudio—741

Parameters 24

NameTypeRangeBehavior
DECAYknob—Adjusts reverb fade-out time. At higher settings, decay time may be impacted by FILTER settings.741
DELAY/TUNEknob0s – 1.5sAdjusts pre-delay (or delay with ECHO ON) from 0 to 1.5s. Logarithmic taper for finer resolution at low settings. When TAP/TRIG CV detected, acts as clock divider/multiplier. In Karplus-Strong mode, sets string tuning over 4 octaves.741
DEPTHknob—Adjusts LFO modulation amount. Off fully CCW (or at noon for env shape). With env: CCW increases negative depth, CW increases positive depth. With EXT LFO IN: acts as attenuverter.741
Zones
Env Negative
Env Positive
  • Env Negative -100–0%With env waveform selected: CCW from noon increases negative envelope depth.741
  • Env Positive 0–100%With env waveform selected: CW from noon increases positive envelope depth.741
DRYknob—Sets output level of dry signal. Analog path throughout. No signal at minimum, unity gain at 12 o'clock, +3dB boost at maximum.741
Zones
Unity
  • Unity 0–0%Unity gain (0dB) at 12 o'clock position.741
ECHO ONbutton—Busses delay output to WET output to mix with reverb. When bypassed, delay is pre-delay only. In Karplus-Strong mode, mixes dry string with WET output.741
FAVORITEbutton—Recalls currently selected Favorite preset. Hold and press one of four center buttons to switch presets. Hold until GREEN flash to save presets.741
FEEDBACKknob—Applies regeneration to delay. More repeats with longer delays, more resonance with shorter delays. In Karplus-Strong mode, affects string decay and structure resonance.741
GLIMMERknob—Dynamically enhances aspects of the input signal's harmonic spectrum. Effect off fully CCW.741
HIGH BANDbutton—Selects which harmonics GLIMMER enhances. LED GREEN = high band enhanced; LED OFF = low band enhanced.741
HIGH DAMPknob—Removes high frequency from regenerating reverb structure clockwise. In Karplus-Strong mode, dampens high end harmonics as string decays. When LOW PASS is active, becomes 24dB/oct LP filter cutoff.741
INFINITEbutton—Freezes current audio input to reverb while allowing new audio to still be processed. Also enables PITCH QUANTIZE mode when held until it blinks amber.741
INPUT GAINknob—Controls gain of input signal fed to reverb through soft clipping stage. LED: GREEN=clean, RED=soft-clipping distortion, BLUE=input muted via IN GATE CV.741
LFO TARGETswitch—Selects LFO target: delay (modulates delay time; in Karplus-Strong mode modulates string tuning), pitch (modulates SIZE/PITCH), or filter (modulates HIGH DAMP / LP filter cutoff).741
LOW DAMPknob—Removes low end content at output and in reverb core as turned clockwise. In Karplus-Strong mode, removes low frequency content of the string.741
LOW PASSbutton—Switches HIGH DAMP to a 24dB/octave low pass filter at reverb output. Hold LOW PASS and turn HIGH DAMP to adjust resonance (Q).741
REGENbutton—Selects regenerative shimmer (pitch shifting within reverb structure, LED GREEN) or input shimmer (pitch shifting at input before reverb, LED OFF).741
SHAPEswitch—Selects LFO waveshape: triangle, square, ramp, saw, random, or envelope (responds to input dynamics with sensitivity set by DEPTH).741
SHIMMERknob—Adds pitch shifting to reverberated signal. Effect off fully CCW. Secondary function (hold REGEN): selects shimmer interval from -1 to +1 octave.741
SHIMMER INTERVALknob-1octave – 1octaveSecondary function of SHIMMER knob (hold REGEN). Selects pitch shift interval from -1 to +1 octave. Two additional positions near noon: -detune (-10 cents) and +detune (+10 cents).741
SIZE/PITCHknob-1octave – 1octaveChanges reverb process rate and size. Clockwise increases size and lowers pitch of regenerating audio. Range is +/-1 octave from center. In Karplus-Strong mode, DELAY/TUNE becomes fine tune; SIZE/PITCH CV controls pitch at 1V/oct.741
SPEEDknob0.067Hz – 15HzControls LFO period from 15s (0.067Hz) to 1/15s (15Hz). With env shape, controls decay rate. With LFO CLK IN, acts as clock divider/multiplier.741
Zones
Clock Division
Clock Multiplication
  • Clock Division -100–0%First half of knob (CCW to noon): clock divisions by 8, 6, 5, 4, 3, 2. No change at noon.741
  • Clock Multiplication 0–100%Second half of knob (noon to CW): clock multiplications by 2, 3, 4, 5, 6, 8.741
TAP/TRIGbutton—Tap to set delay tempo. In Karplus-Strong mode: quick press triggers/plucks string; hold continuously bows string.741
TEXTUREswitch—Selects one of three reverb structures: sparse (granular), dense (plate-like), or diffuse (slow-building atmospheric wash).741
WETknob—Sets the overall reverberated signal level sent to the output.741

Firmware history 0 versions

No firmware history recorded.

References 2

  1. [741]
    Strymon StarLab User Manual (Rev A)manual
    source 741 canonical ↗ archived ↗
    ● verified 2026-05-22
  2. [742]
    Strymon StarLab product pageproduct_page
    source 742 canonical ↗ archived ↗
    ● verified 2026-05-22