Output Waveform - Roland SH-1 Instruction Manual

This switch
is
usually set at
GATE +
TRIG
or
GATE
for triggering the
envelope
generator each time
a
key
is
depressed.
The
gate portion of the
keyboard output
actually
consists of
two
simultaneously
generated
pulses.
The
gate pulse
is
merely
a
constant voltage
which
appears
any time
one
or
more keys
are in
the depressed
position, in
other
words,
it is
like
the
output
of a fight
switch.
Depressing one or
more keys turns the
voltage on;
when
ail
keys have been
released,
the
voltage goes
off.
The
trigger
puise
is
a
short pulse
which
is
generated
when
a
new
key
is
depressed.
When
two
or
more
keys
are pressed,
a
trigger
pulse
will
be produced each
time
the
highest
key
in
the
group
is
depressed or
released.
The
GATE
+
TRIG
position of
this
switch
might
be considered
its
normal
position.
This position
will
trigger
the envelope
generator
for each note
in a
passage played
legato as
shown
at (A).
It is
also useful for
playing
fast
trills
very easily.
This
is
ac-
complished by holding
down
the
lower
note
in
the
trill
while repeatedly tapping
on
the
key for the
upper note of the
trill.
The
GATE
position of this
switch
is
useful
in
legato passages
where
it is
desirable to
produce
only
one envelope forthe complete
phrase.
In
the
LFO
position,
depressing
a
key
will
cause the
envelope generator to be triggered
by
the
LFO.
This
is
useful for
producing
rapidly
repeating notes
such
as
those
sometimes used
in
mandolin playing. In
addition,
this
position
synchronizes the
LFO
output to the
keyboard
so that the
pattern
of repeated notes
will
always
start
the instant a
key
is
depressed.
FUNCTION OF GATE
AND
TRIGGER
GATE
TRIGGER
iL
ENV-1
OUTPUT
WAVEFORM
(GATE
+
TRIGGER)
ENV-1
OUTPUT
WAVEFORM
(GATE
«
ENVELOPE
GENERATOR CONTROLLED
BY LFO
KEY
LFO
(MOD)
ENV-1
OUTPUT
ENVELOPES FOR VARIOUS INSTRUMENTS
ENVELOPE
WAVEFORM
ADSR
SETTING
CONTROLLED
FUNCTION
FLUTE
VIOLIN
2 10
2
-D^a-
u-
VCF/VCA
3
10 2
VCA
TRUMPET
VCF/(VCA)
HARPSICHORD
4 4
VCA
XYLOHPONE
2
2
VCF/VCA
20