Schlappi Engineering Boundary Layer Black

Professional music gear - detailed information and where to buy

Schlappi Engineering Boundary Layer Black

Schlappi Engineering

Boundary Layer Black

4.8 Expert Rating

Product Info

Article Number: 620087
Model: Boundary Layer Black
Price: $383.90

* Prices may vary. Check retailer for current pricing and availability.

The Boundary Layer Black is a seriously versatile module for sound designers and experienced modular users. Its three independent channels, coupled with the adjustable curves and cycle mode, let you create incredibly complex and evolving modulation sources. If you're looking for a powerful and unique envelope/LFO solution beyond the basics, this is a great choice.

Product Description

  • Schlappi Engineering Boundary Layer Black
  • Eurorack Module
  • 3-channel function generator and modulation source
  • Application options: AD or ASR envelope
  • oscillator
  • frequency divider
  • wave shaper
  • envelope follower
  • VCA and more
  • Per channel
  • controls for attack and decay time (rise/fall) and adjustable characteristic curve (logarithmic to exponential)
  • CV input with polarity switch for both time segments
  • Switchable cycle mode
  • Per channel inputs for trigger
  • slew
  • bound (threshold)
  • Common inputs for trigger
  • CV and slew
  • Signal output and EOC trigger output (end of cycle) per channel
  • Outputs for maximum
  • average and minimum values of all three channels
  • Colour: Black
  • Power consumption: 170 mA (+12 V) / 100 mA (-12 V)
  • Width: 16 HP
  • Depth: 52 mm
PROS
  • • Three independent channels offer exceptional routing flexibility for complex modulation.
  • • The adjustable characteristic curves provide nuanced envelope shaping possibilities.
  • • Schlappi’s build quality is evident – robust panel and tight component tolerances.
  • • Cycle mode allows for rhythmic patterns and stepped modulation sequences easily.
CONS
  • • 16HP footprint can be restrictive in smaller Eurorack cases.
  • • The sheer number of controls can feel overwhelming for beginners.
  • • Limited input options – lacks dedicated attenuators or offset for CV signals.

Product Video

Key Features

Type Function Generator / Envelope Module
Stages 3-Channel
HP Width 16
Depth 52 mm
Power Draw 170 mA (+12V) / 100 mA (-12V)
CV Outputs 3 (per channel) + Max/Avg/Min

Similar Products

Line6 Pod GO Bundle - Guitar Multi Effects

Line6 Pod GO Bundle

Guitar Multi Effects

$614
4.6 Expert Rating
Ibanez GRG320FA-TVT - ST Style Guitars

Ibanez GRG320FA-TVT

ST Style Guitars

$439
Electric Guitar, Body: Poplar, Top: Basswood with Art Grain in flamed maple look, Bolt-on neck:...
4.5 Expert Rating
Ketron SD-1000 Bag Bundle - General MIDI Sound Modules

Ketron SD-1000 Bag Bundle

General MIDI Sound Modules

$438
4.4 Expert Rating
NANO Modules ST-OUT - Interface Modules

NANO Modules ST-OUT

Interface Modules

$149
Eurorack Module, Stereo output module for Eurorack systems, Switchable drive level (soft / hard),...
4.8 Expert Rating
Casio AP-750 BN - General Digital Pianos

Casio AP-750 BN

General Digital Pianos

$2,144
Digital Piano, 88 Weighted keys with hammer action (Smart Hybrid Hammer Action, hybrid material made...
4.5 Expert Rating
Ibanez GRGR221PA-AQB Bundle - ST Style Guitars

Ibanez GRGR221PA-AQB Bundle

ST Style Guitars

$325
5 Expert Rating
Kawai K-200 ATX 4 WDB Piano - Pianos

Kawai K-200 ATX 4 WDB Piano

Pianos

$9,119
Piano, With AnytimeX-4 equipment, Millennium III mechanics with ABS carbon parts of...
4.5 Expert Rating
Tobinski LFOs - LFO Modules

Tobinski LFOs

LFO Modules

$373
Eurorack Module, Dual LFO with extensive modulation options, 16 selectable waveforms per LFO (sawtooth,...
4.5 Expert Rating

Frequently Asked Questions

The 'Bound' input acts as a threshold; signals above that level are clipped, preventing runaway modulation and offering a unique shaping effect.
Absolutely, it's quite capable as a standard AD envelope. Just set the slew rates and characteristic curves appropriately and use the EOC trigger to gate your VCA.
While both offer multi-stage functionality, the Boundary Layer Black's adjustable characteristic curves and cycle mode provide a different flavor of modulation than Stages’ more rigid approach.

We use cookies to improve your experience. Learn more