Advertisement
C7)glJat
§©lBli5/SOUND
SYNTHESIS
2-1
gff?)®**^
S9\
fi5tU£e>c=Tr£§
;
&.
e*aiC»*^
2-1
Thinking about sound
synthesis
So
h
if
co
ML
ft
K'J
—
<7>
J:
5
c
co
fro
X9&ML
.Yfc.
ffW-TA4«*\
*4U,
Lt;«i
?
c.
Oik
l X 7
fc
-r
6
ft-
fr
ft
#
CO
J:
7
fc
ft-
iO',>M
t
til
.V.TCOfV-^ft^^ &
i;l4/c»i:,
1
1
tf
i
*
•
&
«.
•
h
t *
* S
fir
£
ft
&
,
<M»
t
t&*
»r.-cco(V
:
3SfrMcot*'-ri*^i-
*«#
itiLn.
First
analyse
the
sound
you
want
to
synthesize.
Ask
yourself:
What
is
the
pitch,
the tone
eolor,
and
the
volume
of
the
sound?
How
do
these
qualities
change
over time?
You
must
break
down
the
sound
into
its
basic
elements
if
you want
to
be
able
to
recreate
it
on
the synthesizer control
panel.
Get
into
the habit
of doing
this
all
the
time.
When
you
hear
a ear
turning
a
corner
on
a
wet
road,
a
large
bird
flapping
its
wings, a bullet whistling past
your
ear,
a
transistor radio
knocked
into
a
swimming
pool,
or
someone's
footsteps
on
the
stairs.
analyse
it
in
your head and
figure
out
how
to
synthesize
it.
mn<0 "#>.
rtf*y.
rfS
y
,
tf
>*
t
t*
5
ft-JJ
"**"
t
"rf
>-
c02H(JficO^CO«lft
hVC-to
i-r
~tf
*y"
t
"*
>"
coStOt>
2
oco
ftft<m
i?
»•
c
t,
**
-j
...»..;
u.
ft litco
«{fc
-Tli.
ft&C;*>*U-Ufc'
7-TL
A 7
?
"tf-v"
t
•
Let's
take the time
signal
recorded
on
the
demonstration
tape
as
an
example and
try to
analyze
it
and
then
recreate
it.
(This
time
signal
is
used
by
Japanese
radio
stations.)
The
time
signal
is
made
up
of
a
combina-
tion
of
two
types of
different tones, three
short
ones and
one
long one.
One
very
obvious
difference
between
the
two sounds
is
their
envelope,
another
is
their pitch.
The
final
long tone
fades
away
over
a
long
period
of time while
the three
initial
shot
1
!
tones end very abruptly.
You may
be
able
to
tell
from
experience
that
the difference
in
pitch
between
the
two
sounds
is
a
m.u
ter
of
one
octave.
What
about
a
different
C
in
tone
color or timbre?
Is
there
any
change
or
are
the
sounds
basically
the
same?
One
thing that
can be
said
about
these tones
is
that
they
have
a
rounded
quality.
Now
let's
try
and
recreate these
sounds.
"#/'
Short
sound
"tf
y
1
sec
1
sec
Long
sound
Although
the
sound
is
not sustained,
it
lakes
longer
to
decay.
fig.
38
Time
signal
envelope
(B$$8(7>SM)
Advertisement
