doepfer-a-148

Doepfer A-148 Dual S&H

Dual sample and hold for random staircase voltages

4 HP Eurorack module

The A-148 Dual S&H contains two independent sample & hold modules that capture and freeze instantaneous voltages, producing classic 'staircase' voltage patterns. Each sub-module can operate in S&H mode (samples on trigger edge) or T&H mode (tracks input while trigger is high, holds on trigger low), making it ideal for generating random melodic sequences, rhythmic CV patterns, and glissando effects.

Features

  • Two independent identical sample and hold sub-modules
  • S&H mode: samples on rising edge of trigger signal
  • T&H mode: tracks input while trigger high, holds on trigger low
  • Dual LEDs per channel indicate positive or negative sampled voltage
  • Voltage range -12V to +12V supported on modules manufactured from August 2005
  • Older version supports -8V to +8V sample input range
  • Jumper-selectable S&H or T&H mode per sub-module (post-August 2005 version)
  • Factory default: S&H upper device, T&H lower device
  • Triggering occurs on leading edge of trigger waveform regardless of pulse width
  • Produces staircase voltages for random patterns (with noise) or rising/falling patterns (with LFO)

Controls & Jacks (10)

  • Ctr.
  • +
  • -
  • +
  • Smp.
  • -
  • In
  • Smp.
  • S&H
  • S&H

How-To Guides

  • Random Arpeggio with Noise Source
  • Glissando Staircase Effect
  • Random Filter Timbre Per Note
  • Dual Random CV for Stereo or Multi-Parameter Control
  • LFO Staircase Rising Pattern
  • Track and Hold Gate-Controlled Freeze
  • MIDI-Synced Glissando
  • Random Quantized Melody Generator

Explore the interactive A-148 Dual S&H panel on BleepDex — tap any control to learn what it does.

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