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CHAPTER 

14

The Parameters

ATTACK Determines the amount of 
time it takes for the amplifier 
envelope to rise to its maximum 
level. The higher the ATTACK value, 
the longer it takes for the envelope 
to rise to maximum volume after 
the start of a note.

DECAY Determines the amount of 
time it takes for the amplifier 
envelope to fade out. The higher 
the DECAY value, the longer it 
takes for the envelope to fall from 
its peak level to the SUSTAIN value.

SUSTAIN Sets a variable level value 
for the amplifier envelope at which 
it remains after the end of the 
DECAY

 phase (see appropriate sec-

tion). The duration of the SUSTAIN 
phase depends on the TIME value 
(see appropriate section).

TIME Sets the bipolar time param-
eter for the amplifier envelope. It 
determines the envelope’s 
response once it reaches the SUS-
TAIN

 level (see appropriate sec-

tion): If the knob is set to the 
center position (12 o’clock) indi-
cated by the mathematical infinity 
symbol, then the SUSTAIN level 
remains constant through to the 
end of the note; if you turn it 
counter-clockwise to the left 
(towards FALL), then the level 
drops off at an increasing rate 
towards the minimum level; If you 
turn the knob clockwise to the 
right (towards RISE), the level rises 
at an increasing rate to maximum.

RELEASE Determines the speed or 
rate at which the volume of the 
amplifier envelope decreases after 
the end of a note. The higher the 
RELEASE

 value, the longer it takes 

for the envelope to fall from its 
current level to the minimum level, 
when the key is released.