Access virus os4 Manual De Usuario

ACCESS VIRUS OS4

The Amplifier Envelope

the numeric equivalent to the
value determined by the current
position of the pot.

Always keep in mind that for a

programmable synthesizer the
position of the control feature or
pot does not necessarily indicate
the actual value of the given func-
tion. The reason for this is that
when you first activate a sound
program, it will reflect the pro-
grammed value. You have to adjust
the control feature before the pro-
grammed value is superseded by
the value you determine manually.

Now fiddle with the

DECAY

pot

while you repeatedly press a key to
activate a note. Hold the key down
for good while. You will notice that
the volume, once it reaches maxi-
mum level at the end of the

ATTACK

phase, drops until it

reaches a minimum level. The

DECAY

pot determines the speed,

or in synthesizer jargon, the rate at
which the volume decreases.

However, the

DECAY

level does not

always drop to the minimum level;
you can determine a random value

between the maximum and mini-
mum levels at which the volume
remains constant. This level in turn
is controlled via the

SUSTAIN

pot.

Whenever the

SUSTAIN

level is set

to maximum, the volume cannot
drop during the

DECAY

phase; in

other words, in this situation the

DECAY

pot is ineffective.

The individual functions of a

synthesizer are designed to inter-
act; many functions are dependent
on other functions. In a number of
cases this means that some func-
tions are subordinate to others, i.e.
the effectiveness of a control fea-
ture is altered, modified or even
negated completely by other
related functions.

The final pot,

RELEASE

, determines

the speed or rate at which the vol-
ume decreases when you release
the key: At low values the sound
ends relatively abruptly, at high
values, the sound fades out more
gradually and softly. The length of
the

RELEASE

phase also depends on

which level the amplifier curve is
at when you release the key: The