will
faII as the
DELAY
FACIOR
is rpved
back totrard
XI.
ft is not necessary
to recirculate a signal
to
nanipulate
its
pitch.
With
the
repeat
button OFF, any
signal
trnssing
ttrrough
will
change
in
pitch
as
ttre DEIAY EACIOR
is
changed. As noted
earlier,
the
pitch
shift detrnnds on ttre change
in
clock
sped.
Ttre faster
ttre
DEIAY FACIOR knob
is
turned, ttre
greater
the
pitch
shift
will
be
and ttre longer ttre
delay
tine is, ttre easier it
will
be to
alter the
clock
speed
significantly during the de1ay.
ltris
pitch
is
shifted
dovnrward as the DEI4Y
FACIOR
is increased
and vise
versa.
Gradual
pitch
changes
are sonetines
referred
to as
Dotpler shifts,
an analogy
to
ttre Doppler
effect
which
@curs with moving
sound
sources such
as train and auto horns
(ttre pitch
rises when
a sound
source
is
roving
toward the
listener and
fal1s
as
the source
recedes).
b.
VIBRAIO, AIIIOI.{AIIC PIrcH
STIEEPII.re
It is
difficult
to
acconplish rea11y sroottr
pitch
changes by
manually
rotating ttre
DEI.'AY FACTIOR control so
ttre rodula!,or
function
provides
an automatic rethod of achieving suooth
pitch
rpdulation effects. Itre LFO npdulates ttre internal
clock
up and
down
by
an
arpunt set by the
WIIIIH
control and
at
a
rate
set by
the
SPED
control.
As
with nanual
pitch
strifting, the
anount
of
npdulator-actuated
frequency
shift
will
depnd on
ttre
choice of delay tfurc as well as
on
the rpdulator controls.
With
delay
of a few rdlliseconds and
with
the
!{IUm and
SPED
controls set
at
about
10:00 orclock,
a
subtle
pitch
rpdulation is
produced
which
rpst listeners
can
just
detect.
Lengthening
ttre
delay
or increasing the WIUffi
yields
a
larger
and
more
obvious sneeping of the
pitch
up and down.
fncreasing
the
SPEED
beyond 12:00 o'clock,
not
only
sveeps ttre
pitch
up
and
dovnr
more
rapidly, but also sweeps it over a wider
frequency range
-
up to several
octaves.
Vibrato is a rapid, lorary>litude
pitch
modulation
vtrich
is
attractive
with
npst
vocals
and
with
sone instrurental
sounds. It
mlst
be
used
with
caution
lest
it sound ludicrous
-
excessively
wide vibrato will
sfuply be
Snrceived
as
an off-key
pitch
wobble.
I)pical control settings
for
producing
an auttrentic-sounding
and
attractive
vibrato
are:
DELAY
32
mS7 W.[DI[I
betr+een
7:00
and 9:00
orclock,
SPEED
between
1:00 and 3:00
orclock.
5. INFIMIE
BEPEAT
With
digital
feedback
we
can sustain
a repeating echo
1nrtrntua1Iy.
Sfurp1y
ptsh
the
red
button
and a
small
trnrti-on
of
tLre
input
signal
will
be stored
in the fu1} merpry as
long
asr the red buttorr
is: in
the
'inu
trnsition.
Ihis
function
can
also be otrerated via
the
rear
1xneI
IIiFII\tllE
RXPEAT
jack.
See
Page
6 for
diagram.
16
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