Doepfer A-111-1 High End VCO - Manual

doepfer System A - 100 VCO 2 A-111
1
1. Introduction
Module A-111 (VCO 2) is a voltage controlled oscil-
lator.
The VCO has a range of about 12 octaves, and
produces four waveforms simultaneously: pulse
(rectangle), sawtooth, triangle and sine waves.
The VCO's frequency is determined by the position of
the range switch, tune and fine tune controls, and the
voltage at the two pitch CV inputs, CV 1 and CV 2.
Footage (the octave of the fundamental) is set by the
Range control, which has seven octave steps. The
Tune control is used for coarse tuning, and the Fine
control for fine tuning of the VCO pitch.
The A-111 can be modulated by both exponential and
linear FM (frequency modulation).
You can control the pulse width of the square wave
either by hand, or by voltage control - Pulse Width
Modulation, or PWM for short.
The A-111 has inputs for Hard Sync and Soft Sync.
CV 1
Lin. FM
CV 2
PCV
H-Sync
Fine
CV 2 Range
A-111
High End VCO
Tune
Lin. FM
PCV
PW
S-Sync
Saw Sine Tri Pulse