Pulsers

Variable Sync VCO

Ramp core VCO with variable sync

Audiophile Circuits League · 16 HP · U3

VARIABLE SYNC VCO
TUNE
LIN FM
SYNC
EXP FM
PWM
INPUT
WAVEFORMS
FREQ
HIGH
MID
LOW
C
AMOUNT
THRESHOLD
CV
PW
CV
FM 1
FM 2
1V/OCT
SYNC
SYNC CV
LIN FM
PWM
0 10 20 30 40 50 60 70 80 90 5

Panel · 81.3 × 128.5 mm Drag to explore →

Description

The ACL Variable Sync VCO is a precise oscillator built on a ramp core with waveshaper circuits, with precise tracking and low temperature drift.

Key features

  • Saw, inverted saw, triangle, sine and rectangle at once
  • TUNE, a ten-turn precision dial spanning about four and a half octaves
  • The FREQ switch picks one of three ranges a little more than two octaves apart
  • When synced, the THRESHOLD knob and its CV blend continuously from no sync through soft to hard sync
  • Linear FM with its AMOUNT control, and two exponential FM inputs with their own attenuators
  • Pulse width with manual and CV control

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