Eurorack Reference / modules /cutlasses/gloop audit site v0.1 — milestone 3
cutlasses/gloop

Gloop

Cutlasses Instruments

Experimental eurorack looper with 4 simultaneous play heads, each independently controllable for speed/pitch, direction, position, and volume. Features overdub recording, built-in effects (delay, reverb, bitcrush, tape, wavefolder), 4 assignable CV inputs, and two mono audio outputs.202

Capabilities 6

4 Simultaneous Play Headsmulti-playhead
All 4 play heads are constantly playing; only the active play head can be modified by panel controls. Each head has independent volume pot and can be panned between outputs A and B.202
Built-in Effects (Delay, Reverb, Bitcrush, Tape, Wavefolder)built-in-effects
202
CV Modulationcv-modulation
4 CV inputs assignable to vol, speed, position, size, pan, start-loop trigger, one-shot trigger, or jump-to-position for individual or all play heads.202
Looperlooper
Records up to 2 minutes of 48kHz 24-bit audio with overdub. Triggered by panel button or trigger input. Four simultaneous play heads each with independent position, size, speed/pitch, direction, and volume.202
Tape Emulationtape-emulation
Dedicated tape effects: AGE (random drop-outs simulating deteriorated tape), HISS (modulated tape hiss), SAT (tape-style saturation), WOBB (tape wow/flutter).202
Varispeed Playbackvarispeed-playback
Per-playhead independent speed/pitch with forward/reverse direction toggle (Encoder 3 press); speed expressible as ratio or semitone pitch shift.202

Jacks 5 — 3 in / 2 out

NameSignalVoltageDescription
Inputs (3)
Audio Inaudio—202
CV 1-4cv-5V to 5V202
Trigger Inputtrigger≥3V202
Outputs (2)
Audio Out Aaudio—202
Audio Out Baudio—202

Parameters 33

NameTypeRangeBehavior
AGEknob—Creates random audio drop-outs simulating an old, deteriorated tape with degraded magnetic surface.202
BCDEknob1bit – 32bitSets the bit depth of the bit crusher effect.202
BCMOmenu_setting—Selects the position of the bit crusher in the effects chain: none, pre (before reverb), post (after reverb), degr (in degrade path), pred (before reverb AND in degrade path), pose (after reverb AND in degrade path).202
BCRAknob—Sets the sample rate divider for the bit crusher effect.202
CRSFknob5ms – 1000msSets the crossfade time applied between the end and beginning of a loop cycle for smooth transitions.202
CV Attenuation 1-4knob—Each dial attenuates the corresponding CV input from maximum (full input level) to minimum (CV zeroed). Attenuation is digital; CV above ±5V is clipped before the module.202
CV Targetmenu_setting—202
Clear Loop Buttonbutton—Hold for 2 seconds to clear the loop buffer. Hold for 4 seconds total to also reset loop position, size, and playback speed of all playheads.202
DEGRknob—With every repeat of the loop, audio becomes progressively quieter and high-end is rolled off. Higher clockwise position increases the degradation strength. Enables Sound on Sound technique.202
Encoder 1knob—Rotate to move the active play head position left to right. Press to cycle through play heads (H1-H4).202
Encoder 2knob—Rotate to change the size of the active loop segment. Press to toggle between Normal [N] and Fine [F] sensitivity.202
Encoder 3knob—Rotate to adjust Jitter amount (0-9). Press to toggle playback direction Forward/Reverse.202
Encoder 4knob—Rotate to change playback speed of the active head. Press to toggle between speed as a ratio and pitch in semitones.202
FEEDknob—Sets the feedback amount of the delay effect.202
HISSknob—Adds tape hiss with a gently modulated frequency range.202
IN Aknob—Sets the volume of the incoming (live) audio signal passed through to Output A.202
IN Bknob—Sets the volume of the incoming (live) audio signal passed through to Output B.202
Jitterknob0 – 9Controls how much the loop position shifts each time the loop restarts. 0 = no movement; 9 = maximum movement.202
MEFFmenu_setting—Selects which output channel (A or B) the mono effects (delay and reverb) are routed to.202
MIXknob—Sets the wet/dry mix of the delay effect.202
Menu Buttonbutton—202
OFFSmenu_setting—Offsets all CV inputs so a 0V-5V source is recentred to -5V to +5V, enabling bipolar modulation from a unipolar source.202
PAN (per head)knob—Pans each play head with equal power between Output A and Output B. Fully anti-clockwise = Output A only; fully clockwise = Output B only; 12 o'clock = both A and B equally.202
Potentiometers 1-4knob—Each potentiometer controls the volume of the corresponding play head (1-4). Fully anti-clockwise mutes the head.202
RVBknob—Sets the level of the reverb effect.202
Record/Overdub Buttonbutton—Press once to start recording; press again to end the loop. Subsequent presses toggle overdub start/stop when overdub is enabled. Screen flashes during recording.202
SATknob—Applies tape-style saturation to the audio.202
TIMEknob5ms – 500msSets the delay time of the built-in delay effect.202
WOBBknob—Applies randomly changing wow and flutter frequency modulation to the pitches of all play heads, simulating tape wobble.202
WRTEmenu_setting—Sets the write mode: none (recording disabled), ovdb (overdub — mix incoming audio into loop), or repl (replace — overwrite buffer with incoming audio).202
Wavefold GAINknob1x – 15xSets the amount of gain applied to the input signal feeding the wavefolder, from 1x to 15x.202
Wavefold MODEmenu_setting—Selects the position of the wavefolder in the effects chain: none (disabled), pre (before reverb), or post (after reverb).202
Wavefold TYPEmenu_setting—Selects the wavefold algorithm: sine or triangle wave based.202

Firmware history 8 versions

VersionReleasedNotes
1.3.1—Beta release. Added pitch modulation via CV spanning all 10 octaves; added screen reset (hold menu button 5 seconds) to recover from rare upside-down display bug. Fixed play head volume pots not reaching 0 (bleed when fully anti-clockwise).203
1.3—Added bit crusher into degrade signal path (pre/post reverb options previously). Added wave folder effect (pre or post reverb). Play heads can be paused/restarted with a quick press of the white button. Replaced Overdub checkbox with Write Mode (none, overdub, replace).203
1.2.3—Fixed issue when recording a loop of maximum length (2 minutes) where play heads would stop responding correctly.203
1.2.2—Minor improvements to calibration. Holding record in the calibration screen now shows calibrated V/Oct values.203
1.2.1—Fixed issue where audio level in was not respected when recording the initial loop.203
1.2.0—Pan can now be a CV target. Text list encoders can be reset to first option by pressing encoder. Mono and stereo effects separated: MEFF applies only to mono effects (delay/reverb) to single channel; bitcrush and tape saturation now stereo. Tape Age split into HISS (tape hiss) and AGE (random dropouts); DEGR moved to Effects 3 page. Hold clear button 2 seconds to clear loop only; hold 4 seconds to also reset play head state. Fixed audio In level not respected during overdub.203
1.1.0—Split tape effect into Wobble (WOBB), Saturation (SAT), and Age (AGE). Added equal-power panning per play head (rather than A/B or A+B). Added CRSF crossfade dial (5ms to 1 second). Fixed tape wobble being applied incorrectly. Fixed distortion when loop position modulation constantly restarted playhead (now sub-sampled at 20Hz). Improved logarithmic gain for pots and A/B input mix. Improved calibration menu.203
1.0.1—Added Tape Degrade (DEGR) — lowers volume and rolls off high-end with each loop iteration. Input Mix A and B now applied when no loop is recorded (not just during playback). Tape effect now applies to all heads, not just head 0. Firmware version now shown as major and minor revision.203

References 3

  1. [202]
    Cutlasses Gloop Manual v1.3.0manual
    source 202 canonical ↗ archived ↗
    ● verified 2026-05-06
  2. [203]
    Cutlasses Gloop Firmware Changelogfirmware_notes
    source 203 canonical ↗ archived ↗
    ● verified 2026-05-06
  3. [204]
    Cutlasses Gloop product pageproduct_page
    source 204 canonical ↗ archived ↗
    ⚠ verified 2026-05-06 · manufacturer changed since last verified