Introduction

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'Persephone' is a VCA (Voltage Controlled Amplifier) using a discrete JFET as the gain element. The JFET can be tastefully (or violently) overdriven for saturation/distortion effects.

Persephone also includes a zero-crossing detector, which can be used to restrict gain changes to zeros in the audio waveform, preventing clicks and pops that can occur with very fast envelopes, especially on lower pitched sounds. In fact, with the zero-crossing circuit engaged, you can use a simple gate as the CV input without clicks.

The module's signal and CV paths are 100% analogue (there is a little discrete logic involved in the zero-cross circuitry).
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Without zero-cross detection, fast envelopes or gates cause clicks when the signal level suddenly jumps up or down.

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With zero-cross detection, the clicks are removed.

Specifications

Persephone's specifications are as follows:
  • Panel width: 8HP
  • Module depth: 37mm
  • Current draw: 33mA on the +12V rail, 26mA on the -12V rail
  • Inputs:
    • CV input (with attenuator)
    • CV input
    • Two audio inputs (summed)
  • Outputs:
    • CV output
    • Audio output

For more detail, please see the user manual.
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Pricing & Availablity

Persephone is available now.

MSRP: UK £159 (inc VAT), US $185 (exclusive of sales tax), EU €185 (inclusive of VAT)

For purchasing links, please see where to buy.

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