Filter Envelope - Access VIRUS|POWERCORE User's Reference Manual

> ENV POLARITY
Determines which way the filter envelope will sweep the cutoff frequency of filter 2. Normal
polarity means that attack sweeps upwards and decay sweeps downwards. Inverse polarity
effectively turns the filter envelope upside-down i.e. attack sweeps downwards and decay
sweeps upwards.

Filter Envelope

The filter envelope is used to automatically
control the cutoff frequency over a certain
time period. In order for these parameters to
have any effect on the sound, Filter 1 Env
Amt and/or Filter 2 Env Amt must be set to a
positive value.
> ATTACK
This determines how long it takes for the envelope to reach its peak.
> DECAY
This determines how long it takes for the envelope to decay from its peak to the sustain level.
> SUSTAIN
This determines the level at which the envelope will sustain.
> SUSTAIN TIME
This determines how long the envelope will remain at the sustain level. At 0, the sustain level
will be maintained as long as the key is held. At positive values, the envelope will rise back up
to its peak level (the higher the value, the quicker the rise). At negative values, the envelope
will sweep down to its minimum level (the lower the value, the quicker the fall).
> RELEASE
This determines how long the envelope will take to fall to its minimum level after the key is
released. The higher the value, the longer it will take.
56