Freqy

Single-sideband frequency shifter after the Foster Freqy

Nonlinearcircuits · 8 HP · 3U

Specs

Function: Effect
Secondary function: not recorded
Width: 8 HP
Height: 3U
Depth: not recorded
Draw +12 V: not recorded
Draw −12 V: not recorded
Draw +5 V: not recorded
Price new: not recorded
Price used: not recorded
Inputs / outputs: 3 in · 2 out
Controls: 4

Availability

Manufacture: Still made inventory of 2026-10-06
In shops: not read yet
Second-hand: not read yet

■ inputs ■ outputs

Panel · 40.6 × 128.5 mm

Description

After the modified frequency shifter a sound engineer, Don Foster, bent for comedy voices on The Ed Sullivan Show in the early 70s. A single-sideband shifter, simpler than the Bode and Moog designs: a 21 kHz sine multiplies the input, a band-pass keeps the upper sideband, a VCO's sine multiplies it again, shifting it up to ±5 kHz; an envelope follower and vactrol quieten the bleed. With nothing in IN 2, the IN 2/FB knob sets feedback.

Key features

IN 1, IN 2 / F/BACK and CV in; OUT and MIX OUT
IN 1, FREQ, IN 2/FB and CV knobs
8 HP; Nonlinearcircuits publishes no current draw, depth or assembled price (it sells the DIY PCB and panel), and ModularGrid lists none

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Freqy

Description

Key features

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