Alesis QS6.1 Reference Manual page 124

Editing Programs: Part 8
Filter Envelope Depth (-99 to +99) Page 7
The Filter Envelope is one of the most important sets of parameters in making a
Program. Many Programs will use the Filter Envelope to determine the tonal
character of the sound over time (attack, decay, sustain, and release). At +00, the
filter envelope has no effect. Positive values raise the filter from the baseline cutoff
frequency according to the envelope shape, and negative values similarly lower the
cutoff frequency. The higher the number (negative or positive), the greater the effect.
Filter Envelope parameters (such as attack and decay time) are programmed within
the Filter Envelope Function (see page 131 ).
Note: This parameter interacts with several others. If you hear no change when you
raise the Filter Envelope Depth, try lowering the Filter Frequency on the FILTER
function's page 1 (push [PAGE ] once to find it).
QS6.1 Reference Manual 123