Cutoff Scaling - Yamaha SY77 Operating Manual

Resonance: Resonance lowers the level of the
sound below (for HPF) or above (for LPF) the
cutoff frequency, creating an increased peak of
emphasis. (This may reduce the overall volume.)
High settings of resonance will make changes in
cutoff frequency quite easy to notice. When the
two filters are being used in tandem as a Band
Pass Filter (i.e., when filter 1 is set to HPF),
resonance will not have a significant effect.
Extremely high settings of filter resonance will
make the filter oscillate so that it produces a
pitch of its own. This is a technique often used
on analog synthesizers of the past.
Ctrl = LFO: When Ctrl is set to LFO, the filter will
be controlled both by the Main LFO and by the
controller which has been assigned to Filter
Cutoff Depth. (Refer to Voice common data
12. (F4) Controller.) Key velocity will shift the
cutoff frequency.
APM ELEMENT DATA / AFM FILTER
Summary: The cutoff frequency of each filter can be
adjusted across the keyboard.
Procedure:
From: APM element job
directory 8. AFM filter
Select: 02:Cutoff Scaling
filter 1 press Fl (Fitl)
filter 2 press F2 (Filt2)
Specify: filter scaling parameters
Ctrl = EG: When Ctrl is set to EG, the filter will be
Ctrl = EG-VA: When Ctrl is set to EG-VA (EG
Note: When Ctrl=EG or Ctrl=EG-VA, the effect of

8.2 Cutoff scaling

(JUMP #248)
(JUMP #250)
(JUMP #251)
controlled by its own filter EG as explained in
the following section 8.3 Filter EG. If Velocity
Sense is set to a value other than 0, key velocity
will shift the overall offset of the EG. The posi-
tion of the controllers assigned to Filter Modu-
lation Depth and Filter Cutoff Depth will be
sampled at the beginning of the note (key on),
but will have no effect during the note.
voice attack), the filter will be controlled by its
own filter EG as explained in the following sec-
tion 8.3 Filter EG. If Velocity Sense is set to a
value other than 0, key velocity will modify L1
(level 1) and Rl (rate 1) of the filter EG.
the controller on the cutoff frequency will be
fixed when the note is played. Moving the con-
troller after playing the note will have no effect.
VOICE EDIT MODE
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