ajh-synth-sample-hold-slew

AJH Synth Sample Hold & Slew

Sample Hold & Slew

12 HP Eurorack module

A 12 HP utility combining sample-and-hold and track-and-hold with Restrict, colour-shaped regular or clipped noise, a wide-range clock source, and gated linear or exponential slew.

Features

  • Generates random and pseudo-random control voltages, staircase waveforms, audio aliasing effects, portamento-style effects, and adjustable audio-range noise.
  • Restrict limits how far the held output moves after each sample while retaining the input's overall range over successive holds.
  • External high-rate clocking lets the sample-and-hold section create downsampling effects.
  • The gated slew generator can operate independently or in series with the sample-and-hold section.
  • Noise, clock, sample/track-and-hold, and slew functions can operate simultaneously as separate utilities.

Controls & Jacks (19)

  • Noise Colour— Shapes the analogue noise: centre leaves it unfiltered, counterclockwise applies low-pass filtering, and clockwise applies high-pass filteri
  • Slew Output— Outputs the slewed control-voltage signal.
  • Clock Output— Outputs the internal ±5 V square-wave clock/LFO.
  • Restrict— Controls how strongly each newly sampled value is constrained by the preceding held value; fully counter-clockwise gives conventional sample
  • Slew Time— Sets the slew or lag-generator time constant.
  • Slew Input— Input to the slew generator; patching it overrides the normalled sample-and-hold output.
  • Clock Input— Clock input for the sample-and-hold section; an external signal overrides the normalled internal clock.
  • Noise Output— Outputs the colour-shaped analogue noise signal.
  • Sample Output— Outputs the sampled or tracked signal.
  • Rate— Sets the internal square-wave clock/LFO rate, from approximately one cycle every 30 seconds to over 2 kHz; fully down turns the LFO off.
  • Slew Gate Input— Receives an external CV or gate pulse to switch the slew effect in or out of circuit.
  • Slew Direction— Selects slew-up only, slew-down only, or slew in both directions.
  • Slew Gate Logic— Reverses the control logic of the gated slew function.
  • Sample Input— Signal input for the sample-and-hold section; patching it overrides the normalled noise source.
  • Slew Response— Selects linear or exponential slew response.
  • Clock Activity Indicator— Indicates the actual clock rate at the sample-and-hold input, including an external clock when patched.
  • Slew Active Indicator— Lights when slew is active.
  • Noise Type— Selects regular or clipped noise for the NOISE jack.
  • Sample Mode— Selects traditional sample-and-hold or track-and-hold operation.

How-To Guides

  • Make a triangle LFO

Explore the interactive Sample Hold & Slew panel on BleepDex — tap any control to learn what it does.

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