Owner`s manual

34
CHAPTER 4 -
Modular Components of the TimewARP 2600
CHAPTER 4 -
4.3.1
VCO 1
VCO 1
generates saw, square, and sine outputs. The sine output is a TimewARP
2600 extension; the original ARP 2600 VCO1 provided just sawtooth and
squarewave outputs.
The default signal to the  rst (unattenuated)
FM Control
input is from the
keyboard. The
Audio/LF
switch above this input switches the mode of the
VCO
from
Audio
(10Hz - 20,000Hz) to
LFO Mode
(0.03Hz – 30Hz). When the
VCO
is in
LFO
Mode,
the default connection to the keyboard is removed. This can be overridden
in this mode by patching a cable to the
Keyboard CV
output on the left side of the
Keyboard CV output on the left side of the Keyboard CV
front panel.
The default signals to the next three
FM Control
inputs are from a) the
Sample &
Hold,
b) the
ADSR Envelope Generator,
and c)
VCO2
sine.
4.3.2
VCO 2
VCO 2
generates sine, triangle, sawtooth, and pulse outputs. A pulse-width slide
control can adjust the duty cycle from 10% to 90%; at the middle of its travel, the
pulse width is 50%, that is, a square wave.
The default signal to the  rst (unattenuated)
FM Control
input is from the
FM Control input is from the FM Control
keyboard. The
Audio/LF
switch above this input switches the mode of the
Audio/LF switch above this input switches the mode of the Audio/LF
VCO
from
Audio
(10Hz - 20,000Hz) to
LFO Mode
(0.03Hz – 30Hz). When the
VCO
is in
LFO
Mode,
the default connection to the keyboard is removed. This can be overridden
in this mode by patching a cable to the
Keyboard CV
output on the left side of the
Keyboard CV output on the left side of the Keyboard CV
front panel.
The default signals to the next three
FM Control
inputs are from a) the
FM Control inputs are from a) the FM Control
Sample &
Hold,
b) the
ADSR Envelope Generator,
and c)
VCO1
square.
There is a fourth attenuator-governed input, for digital control of the pulse width.
The default signal at this PWM input is from the
Noise Generator.