While
playing, gradually raise VOLUME until the synth can be heard. For optimum
signal-to-noise ratio, the Prophet-600's
VOLUME
knob
should be
set as
high
as
possible,
while overall audio system gain is reduced with the power amplifier control.
The
MASTER TUNE knob simultaneously adjusts OSC A and OSC B pitch on all voices
over about a
one-semitone range.
It is used to
easily tune the Prophet-600 to another
instrument,
such
as
a piano. If no other instrument is in use, the MASTER TUNE knob
should be
centered.
3-3 PITCH AND MOD WHEELS
The
PITCH and MOD wheels to the left of
the keyboard are performance
tools
which
may take some practice to master.
The wheels are monophonic. That is, both wheels
affect all
voices uniformly:
all
voices are pitch-bent by the same interval and
modulated to
the same depth. An integral part of playing is using
the wheels
and the
synthesizer
controls
(for
example, FILTER CUTOFF and
ENVELOPE
AMOUNT) for
expression through dynamic and timbral
variations.
The
PITCH wheel is normally left in its center-detent position, from which it is
possible to "bend" oscillator pitch up or down by about a 3rd.
Check that the MOD wheel is down (minimum modulation). The MOD
wheel
sets the
modulation level. When not in use the wheel is left "down" and no modulation will
occur. When the wheel is advanced fully "up," modulation is maximum.
3-4
RETUNING
The microcomputer tunes the oscillators when the Prophet-600 is first switched on.
But as the
instrument warms
up, the temperature change causes the oscillators to
drift. So it
will ocassionally be necessary
to retune, particularly
during
the first few
minutes of operation. After 30 minutes or so the instrument should not have
to be
retuned
very often. On the other hand, the more often
you
activate
TUNE,
the
more
accurate the tuning will be. You will soon learn to hear when the Prophet-600 needs to
be
tuned.
To
retune, simply press the TUNE switch. Except for this switch, the control panel will
go dark while tuning is in process. Retuning takes up to four seconds, depending on how
far out of tune the oscillators drifted since the last tuning. The more often
you tune,
the
less
time each tuning takes.
When tuning is concluded, the
Prophet-600
returns to exactly its state before the
tuning. (Even unrecorded Edit
Mode
changes are restored.)
It
may
be
necessary
to
slightly readjust MASTER TUNE.
3-5 VOICE ASSIGNMENT
The microcomputer continuously assigns the six synthesizer voices to the most
recently-played keys on the keyboard. You can play a maximum
of
six keys at once.
If
CM600A 12/S2
3-3
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