The
Model
800
TRIGGER
IN and
VOLTAGE IN
switches
should
be
in
the
up
(1)
position.
Its
TRIGGER
OUT
switch
should
be in
the
center (2)
position.
When recording
a
sequence,
the
Prophet
will
send each
note
played
(regardless
of voice
assignment),
to
the
sequencer
together
with
a
gate.
When
playing
back
a
sequence,
the
sequencer
control
voltage
(CV)
and
trigger
outputs
control
Voice
5.
The
SEQUENCER
INTERFACE
jacks can
also
be used
for
other functions:
the OUT
jacks
can
be
used
to
control
nnost
common
1-volt-per-octave
synthesizers
,
while
the
IN
jacks
can
be
used
to
apply
other
controllers
(such as
analog
sequencers,
sample-and-
hold
units,
guitar
synthesizer
pitch
followers,
etc.) to
Voice
5.
However,
since
VOLTAGE
IN is
"digitized"
by the
microcomputer
to maintain
tuning with the
other
four
voices,
the
external
controller
will
not be able to
"glide."
Also,
the voltage
will
only
be
converted
on a
new gate edge.
Both
VOLTAGE
jacks are
exactly
1-volt-per-
octave.
The
TRIGGER
OUT is
actually a
+15V gate,
and
GATE IN can be any
signal
which
switches
through at
least
+3.5V.
NOTE;
Any
time a
plug
is
inserted
into the
GATE
IN
jack on
the Prophet-5,
the
computer
disconnects
Voice 5 from
the
Prophet's
keyboard. The
instrument becomes
essentially
a
^-voice
synthesizer,
with
Voice 5 reserved
for the
external input (if any).
The
sequencer
interface
cannot
operate if
Voice 5 has
been defeated
(see paragraph
1-
8).
3-t
ANALOG
The
ANALOG jack, in
effect,
allows remote
control of the PITCH and
MOD
wheels. It
is
specifically
designed for use
with
the
Model 1001 Remote
Keyboard. If
you are
technically
competent, you can
make an
appropriate analog controller from the
following
specifications.
Otherwise,
you
can
order the Analog Interface Adapter,
SCI
Model
Z^2.
This adapts the
special ANALOG
connector to two standard phone jacks for
PITCH
and
MOD wheel control
voltage (CV) inputs,
usually provided by voltage pedals.
CAUTION: Since we have
no idea
what you will be
connecting
to the
ANALOG and
DIGITAL inputs, we
cannot
guarantee this
interface will
work
with any
custom device.
You
are completely
responsible
for any
damage to the
Prophet which may result
from
use
with non-SCI
products.
The
connector is
a
5-pin
Switchcraft
SL-17-5F, SCI
#3-05^.
To
mate,
use SL-'^0-5M,
SCI //P-05'f.
Pin
1,
GROUND
Pin
3,
+22V,
unregulated,
50 mA
Pin
5,
-22V, unregulated,
50 mA'
These
two supplies have
current-limiting
resistors, but are not' protected
against
short
circuits.
Accessories should
be fully
tested with another
power source
before connec-
ting
to these
supplies.
CAUTION: The
Prophet can be damaged
if these
supplies
are
tampered with.
For
best
protection
of the
Prophet, it is best
to avoid
using
these
supplies.
Pin
^,
PITCH
WHEEL
CONTROL
VOLTAGE
INPUT (P-WH CV IN)
This input
raises
or
lowers the pitch of
all five voices. The
voltage
applied
should be
nominally
zero
for the instrument
to
be tuned to
A-4^0.
Both
positive and
negative
voltages
can
be
applied. To prevent accidental
detuning,
the Prophet
disables
this
input
during its
TUNE
routine.
3-2
'
CMIOOOD
2/82
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