.a
3.4.1
DC0
1
The basic sound sources of the
Poly-800
are the eight Digitatly
Controlled Oscillators
(DCOs),
which offer precise frequen-
cy tuning and stability through the use of advanced
integrated
digital technology.
The
Poly-800
DCOs
operate on a principle of additive
squarewave synthesis. Different waveforms are created by
adding together, in different proportions, up to four
squarewave Harmonics at octave intervals, from 16’ to 2’ (a
four octave range.)
Each DC0 then is separately articulated by its own 6-stage
Digital Envelope Generator, which allows very complex and
interesting sounds to be created, especially when Iwo
DCOs
are combined oer voice in DOUBLE Mode.
1
PARAMETER NAMES AND FUNCTIONS
I::
OCTAVE
Determines the basic pitch range over a three octave
range (High, Middle, Low). By choosing different com-
binations of
the
Octave and Harmonics parameters,
you can select a basic pitch range from
1
’
(highest)
.
to 32’
(lowest).
.mm
The Waveform parameter
works
together with the
,
16’
.
2’ Harmonics parameters (see below)
to
deter-
mine the basic tonal quality (timbre) of the oscillator.
The Harmonics parameters turn each squarewave
Harmonic ON and OFF. The Waveform parameter
selects the actual LEVELS of the individual
.-
squarewave Harmonics which are added together to
create the final waveform.
The
Poly-8OO
provides a choice of
two
waveforms (har-
monic levels): Squarewave
(n)
at Value
:
,
and
Sawtooth (
h)
at Value
2.
l
With a Waveform Value
of
:
,
all of the
squarewave
Harmonics (that are turned ON) are added together
at equal volume:
nr~.n~~~b~
turned ON or
OFF at
each
feet.
16’.
8’.
4’.
2’
all
ON
l
With a Waveform Value of
2
,
each Harmonic (that
is turned ON) is combined with a different relative
volume (16’ is loudest, 2’ is softest):
8’. 4’. 2’. ON
4’. 2’ ON
step wave
.
wAvcRMT
m:;m
HARMONICS (16’ 8’ 4’ 2’)
The Harmonics parameters turn any combination of
individual squarewave harmonics on and off.
regardless of the Waveform Parameter Value. This
allows a wide variety of different waveforms to be
created. For example. you could add together just the
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