Yamaha SY99 Owner's Manual page 322

Press: Operator select button to choose OP2 and
repeat the above operation.
Press: EXIT to return to the AFM job directory
9. Introduce the AWM wave into operator 2 of the
FM algorithm
From: Voice Edit
Press: F3 (E1) to select the
AFM element for editing
Select: l:Algrthm
(AFM algorithm)
Press: F2 (Extn) This page selects the external
inputs to each operator.
Use the cursor keys to position the cursor over the
"off on the AWM line under OP2. Press YES to
change the "off to In1.
Press: EXIT to return to the AFM job directory
10. Raise the output level of operator 2.
From: AFM job directory
Select: 4:0utput and press
F2 (All)
Move: the cursor to OP2 and use the data slider
to gradually raise the level until you hear
the AWM wave.
Important note: Depending on the harmonic con-
tent of the selected wave, the sound may be-
come distorted as you increase the output level
of OP2. If it does, exit to the AFM job directory,
select l:Algrthm and press F3 (Inpt) (JUMP
#233). Note that under the AWM indicator be-
neath OP2 there is a number 7. Lower this value
to 4 and then return to 4:Output (JUMP #242)
and adjust the OP2 output level again. The level
set for each operator in the Algorithm Input acts
as a multiplier for the value specified in Output.
To avoid distorting the sound appearing at OP2,
you must set the correct gain values. Of course,
distortion can be an interesting effect in its own
right. By adjusting the operator output and oper-
ator input, a wide range of AWM input levels
can be used.
The steps outlined so far may not result in a very
interesting sound, but the following points will
illustrate some of the possibilities of RCM hybrid
synthesis.
(JUMP #246)
(JUMP #232)
It is beyond the scope of this manual to provide
detailed instruction in the use of this new hybrid
(JUMP #242)
system although additional programming guides will
be forthcoming. The only steps required for using
RCM hybrid synthesis are to turn on the AWM in
the Inpt page and select voice mode 9 or 10. The
rest is up to you. This is simply a very basic guide
which you may use as a starting point.
The AFM operator into which the AWM wave-
form was introduced can be modulated by other
operators, or can modulate other operators.
The same AWM waveform can be introduced into
two or more AFM operators, perhaps with each
operator set to a different pitch.
Since the AWM waveform is routed through the
filter of the AWM element before being intro-
duced into the AFM operator, its filter settings
can be continuously varied, resulting in a realtime
filtered waveform which can be modulated by and
can modulate other operators (waveforms); i.e.,
Realtime Convolution and Modulation — RCM
hybrid synthesis. ("Convolution" refers to pro-
prietary Yamaha digital filtering technology.)
APPENDIX
3 1 1