Shlappi Engineering Boundary Layer

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The Schlappi Engineering Boundary Layer is a versatile Eurorack module that debuted on June 25, 2025, priced at $325 USD. It functions as a triple cycling slew generator, offering a wide range of modulation and audio processing capabilities.

🔧 Key Features

  • Three Independent Channels: Each can operate as a:
    • Modulation oscillator
    • Voltage-controlled slew (including portamento)
    • AR/AD envelope (decay or release determined by input)
  • Global Controls:
    • Three global inputs affecting all channels
    • Three combined outputs providing MAX, MID, and MIN voltages across channels
  • Modulation Capabilities:
    • Oscillation range from low LFO rates (approximately one cycle per minute) to audio rates exceeding 10kHz with exponential feedback
    • CV input switchable between RISE, FALL, or BOTH
    • Bound input for simultaneous control over cycling rate and amplitude
    • TRIG input for AD envelopes
    • SLEW input for AR envelopes, portamento, or filtering
    • EOC (End of Cycle) output header switchable between EOR (End of Rise) and EOF (End of Fall)
  • Physical Specifications:
    • 16 HP width
    • Skiff-friendly 32mm depth (including cable)
    • Power consumption: +12V 170mA, -12V 100mA

Price: $325

Link: https://schlappiengineering.com/products/boundary-layer