12.1.3
Envelope Shaper
The envelope shaper of the synthesis part is linked
with an internal amplifier (it is the only internal
connection of the synthesizer)
The amount of the amplifier level modulated by this
envelope is set by the TRAPEZOID knob, and the
output level is set by the SIGNAL knob.
The envelopes of the XILS 4 have two modes. The Trapezoid is as per the original model, whereas ADSR is
like that found on almost all standard synthesizers.
On the left is an illustration of both cycle types:
Envelope (ADSR), and Trapeze.
ATTACK
: Sets the speed of Attack, and is
common to both modes.
ON
: Sets the ON (or Hold) duration of the
Trapeze mode.
DECAY
: Sets the Decay duration, and is
common to both modes.
SUSTAIN
: Sets the level of the sustain phase
the Envelope (ADSR) mode.
RELEASE
: Sets the release duration of the
Envelope (ASDR) mode.
OFF
: Sets the OFF duration of the Trapeze
mode. This is the time between the end of the
decay and the beginning of a new cycle. When
this knob is turned fully clockwise, there is no
loop.
As you can see in this diagram, the sustain
step is only maintained if the Gate is
connected.
In the same way, if the gate is not connected,
the Trapeze mode will loop indefinitely, if the
OFF time is not set to maximum.
