Contour 1 by Joranalogue Audio Design – a SLEW LIMITER & FUNCTION GENERATOR

  • By: Thorsten Meyer
  • Date: Monday, 12 August 2019
  • Time to read: 2 min.

Contour 1 a Slew Limiter & Function Generator

Joranalogue Audio Design launched Contour 1. Contour 1 brings a fresh approach to this classic circuit. It delivers much-improved performance and control by incorporating modern design techniques. At its most basic, a slew limiter slows down the rate of voltage change in a signal. On Contour 1, the rising and falling rates can be individually set using sliders and CV modulation.

Contour 1 by Joranalogue Audio Design

Contour 1 Features

  • Analog voltage controlled bidirectional slew limiter.
  • Precision circuitry to slew any signal, including pitch CV, accurately.
  • Separate rise/fall slope bending with voltage control and compensation for minimal effect on slew time.
  • Real-time visual feedback through LEDs on slew time sliders.
  • Dedicated gate input in addition to the analog slew input: easily create +10 V attack-release (AR) envelopes, regardless of the gate amplitude.
  • Trigger input and push-button: reset the slew core and trigger a one-shot attack-decay (AD) envelope through a single trigger signal.
  • Voltage hold gate input ‘freezes’ the slew core. Pause envelopes and LFO modulations, or create pulse-width-sensitive sync sounds at audio rates.
  • Impedance-compensated regular and inverted analog outputs.
  • Rise and fall status gate outputs.
  • Loop switch for variable waveshape temperature-stable VC(LF)O operation. Gate input functions as an oscillation enable input in loop mode.
  • Capable of 1 volt/octave tracking over several octaves.
  • Wide slew time range: 500 µs to 30 seconds per slope. Audio range switch setting constricts range to ease tuning.
  • V/octave trim potentiometer accessible from the front panel.
  • Highly multifunctional: slew limiter, envelope generator, envelope follower, (gated) VC(LF)O, frequency divider, slope detector and much more.
  • Precision-milled 2 mm anodized aluminum front panel with high-resolution, non-erasable graphics.
  • Bullet-proof design: polarised power header and MOSFET protection circuit.
  • Includes 16-to-10-pin Eurorack power ribbon cable.
  • Premium mounting hardware: black screws, black nylon washers and matching hex key.
  • High-quality components and assembly; designed and made in Belgium.

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