Sequential Prophet X, User Manual

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30 31 Mixer Sequential Prophet X User’s Guide Filter
To create super-wide stereo synth sounds, pan oscillator 1 hard left (-64L) and
oscillator 2 hard right (63R).
TAB 3 - Hack/Deci
BIT HACK
Bit Hack Decimate
DECIMATE
0 0
Hack/Deci Mixer LPF Misc Panning
Bit Hack: 0...15
—Reduces the bit depth of the original 16-bit samples
by a selectable number of bits, so that a value of 15 results in extremely
coarse 1-bit fidelity. This has the effect of reducing fidelity and increas
-
ing “noisiness.” The more harmonics there are in a sound, the more effect
bit hack
has. Higher settings can sound quite nasty. Bit hack occurs
pre-filter and pre-effects, so you can filter the bit-hacked sound and add
digital effects such as reverb and delay.
Decimate: 0...127 —Reduces the sample rate of the samples and the
digital oscillators. This has the effect of reducing fidelity and adding
digital artifacts. Higher settings can sound very harsh. Decimation, like
Bit Hack, occurs pre-filter and pre-effects, so you can filter the decimated
sound and add digital effects.
Filter
The Filter takes the basic, raw sound of the samples and digital oscil-
lators and subtracts frequencies, changing their harmonic content and
the character of their sound. This change can be varied over time using
the Filter Envelope
to produce more dynamic, animated timbres. The
Prophet X’s filter is a classic, 4-pole, resonant low-pass filter that can self-
oscillate (generate a sine wave) when
resonance
is set to its maximum.
In addition, when used in 8-voice mode, the Prophet X filter has a stereo
signal path. This results in a noticeable increase in richness and depth.
This also gives you the ability to pan instruments 1 and 2 and/or oscil-
lators 1 and 2 to different positions in the stereo field. (See
“TAB 2 -
Panning” on page 29.)
In addition to the low-pass filter, there is a resonant high-pass filter available
in the
effects
section. If you want to sweep this filter using an envelope as you would
typically do on the low-pass filter, use the Modulation Matrix to route the Filter Enve
-
lope or one of the Auxiliary Envelopes to it. Each sample instrument also has its own
Tone control which provides low-pass and high-pass filtering (without resonance).
The Prophet X Filter
To hear the effect of the filter:
1. Press the
global
button and use Soft Knob 1 to navigate to the
basic
program
command, then press Soft Key 1 (
write now
).
2.
Hold down a note and rotate the filter’s
cutoff
knob. Notice how it cuts
the high frequencies as you rotate counter-clockwise, making the sound
of the oscillator less bright. If you turn the
cutoff
knob fully counter-
clockwise you’ll filter out all frequencies and hear nothing.