Roland MC-808 Sound List page 48

Patch editing parameters
Filter Env (Filter Envelope)
These parameters specify the depth of the filter envelope (time-variant change in cutoff frequency), and specify the shape of the envelope
itself.
T1 T2
L1
L0
L2
Cutoff
Frequency
key is
pressed
Parameter Value
F-Env Depth -63– +63
(Filter envelope
depth)
F-Env Time KF -100– +100
(Filter Envelope
Time Keyfollow)
F-Env Time1–4 0–127
(Filter Envelope
Time 1–4)
F-Env Level0–4 0–127
(Filter Envelope
Level 0–4)
48
T3 T4
L3
L4
Time
key is
released
Description
Depth of the filter envelope
Increasing this value will produce a greater effect. Negative (-) values will invert the envelope.
Amount by which the note you play (relative to C4) will affect the filter envelope times (T2–T4)
Increasing this value will cause greater change to occur. Positive (+) values will cause the times to be-
come shorter as you play toward the right of the keyboard. Conversely, negative (-) values will cause
the times to become longer.
Time
C1 C2 C3
Filter envelope times (T1–T4)
Higher settings of these values will lengthen the time over which the next cutoff frequency level of
the envelope is reached. (For example, T2 is the time over which the level changes from L1 to L2.)
Filter envelope levels (L0–L4)
Specifies the change in cutoff frequency at each point, relative to the reference level.
-100
-50
0
+50
+100
C4 C5 C6 C7
Key