Owner`s manual

CHAPTER 4 -
37
CHAPTER 4 -
Modular Components of the TimewARP 2600
4.5.2
AR Envelope Generator
The
AR Envelope Generator
offers variable
Attack
time and  nal
Release
time. Two vertical
sliders control these parameters.
The generator produces an output only when a gate signal is present at its input. At the
onset of a gate signal, the output level rises to +10vV, at a rate set by the
Attack
slider.
When the level reaches +10vV, it remains at this level while the gate signal continues.
Finally, when the gate ends, the output falls to zero at a rate set by the  nal
Release
slider.
If the gate ends at any time during the
AR
cycle, the generator immediately advances to
its  nal
Release
phase: the current output level starts falling to zero from whatever value
it had at the moment the gate ended.
The
AR Envelope Generator
does not require a trigger signal for any phase of its
AR Envelope Generator does not require a trigger signal for any phase of its AR Envelope Generator
operation.
4.6
Voltage Controlled Ampli er (VCA)
The
Voltage Controlled Ampli er
has a maximum gain of unity and a dynamic range
Voltage Controlled Ampli er has a maximum gain of unity and a dynamic range Voltage Controlled Ampli er
of l00Db. With the initial gain control at maximum, and with no control input, the
VCA
will pass with unchanged amplitude any signal presented to its signal input. On
the other hand, with the initial gain control at minimum, no signal will pass through
the ampli er at all unless some
positive
signal level (the
VCA
does not respond to
negative control signals) is present at one or both of its control inputs.
The  rst control input has
linear sensitivity;
the gain of the ampli er in response
to a signal at this input is S/10, i.e. dividing the signal level by 10 will give the gain
factor.
The second control input has
exponential sensitivity;
the gain of the ampli er in
response to a signal at this input will equal 10Db/vV.
There are two audio signal inputs to the VCA. The default connections to these are
from the
VCF
and the
Ring Modulator.
Inserting a patch cord automatically disconnects
the default signal.
The default signal at the linear control input is from the
AR Envelope Generator,
and
at the exponential input is from the
ADSR Envelope Generator.
Inserting a patch cord
automatically disconnects the default signal.