7.2.2.1 FiAtt = Filter Attack < 000-127 >
Controls the attack of the filter envelope. The filter envelope controls the cutoff of the
filter and creates a sound curvature. Please note that you can only hear filtering if the
routing is > 0 because otherwise the filter is off the signal chain.
7.2.2.2 FiDec = Filter Decay < 000-127 >
Controls the decay of the filter envelope.
7.2.2.3 FiSus = Filter Sustain < 000-127 >
Controls the sustain of the filter envelope. This is the value to which the envelope rises
or falls after attack and decay have faded when the key is held.
7.2.2.4 FiRel = Filter Release < 000-127 >
Controls the release of the filter envelope. This is the value of how fast the envelope
falls from the sustain level to zero after the key has been released.
48 ALPHA BASE Operating Manual