Yamaha CS-80 Instruction Manual page 31

(
Timpani
Two
voices are used
at
once for
this
patch (and the
next one), so
program
panels
]
and
II.
Panel
i
is
for the
initial
"mallet" sound. Instead of the
waveform
used
in
bells
above, turn off
square
and sawtooth, and
use only
Noise
[26]
.
The Ring Modulator
[16]
should
also
be
turned
off.
HPF
and
LPF
[26
&
28] are set to give
a
narrower bandpass,
and
AL
[3]
is
lowered
to avoid
letting the
sound
get
too
thin.
The
VCF
and
VGA
Release
time [34
&
40] are longer, and
VGA
Sustain
level [39]
is
lowered to simulate the
die
away
of the
mallet sound. Panel
II is
used
for the
"drum"
sound.
Sine
wave
[36]
,
sawtooth
[24]
and
a
square
wave
[23] are used together,
and
the
square wave
is
set at
75%
pulse
width
[22]
with moderate
pulse
width
modulation
[21
]
at a
slow speed
[20]
;
the
several
waveforms
give
a
richer
sound, with
the sine
wave
emphasizing the
fundamental. Set Feet
il
[5]
at
16'
(the
Noise
in
Panel
I
is
not affected
by the Feet
setting).
The
filter
cutoffs
are
the
same
as
Panel
I,
but
resonance
is
added and
the
VCF
envelope
is
changed.
The
entire
VGA
envelope
is
different, since
the
head
resonates long after
the mallet
is
gone.
The
addition
of
sub
oscillator
VGA
modulation
[11] to the pulse
width
modulation on
Panel
II
emulates
the reverberant
sound
of the
drum
body.
This 2-voice effect
could be
simulated with just
one
channel.
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11
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Pizzicato
&
Legato
This patch simulates the effect of
one instrument
playing quickly
(pizzicato) using fast
attack
and
decay
times,
and
of
a
second instrument playing slowly
(legato)
using slower attack
and decay
times.
The
CH?B"B
PIZZICATO
patches can be seen
clearly
on the diagram.
Observe
that Panel
II
uses sine
wave
[36]
and
VGA
exclusively.
Notice
when
you
play that
quick key
strokes give a
"plucked" sound, and holding keys
down
longer allows
a
second, completely different voice to develop.
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