4ms Company Matthias Puech Ensemble Oscillator Manuale d'uso - Pagina 7
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Cross FM knob, jack, and switch
The Cross FM feature controls how much the oscillators modulate the frequency (FM) of each other.
When the knob is fully down, there is no modulation. As the knob is turned up, complex sets of
harmonics arise. Since the oscillators are related to each other in frequency (due to being quantized to
Cross FM
the selected scale), the particular type of FM sounds created by this feature are often sonically
interesting.
The Cross FM switch controls the "FM algorithm", i.e. which oscillator(s) modulate which.
Up
There are three positions:
All
• Up: The lowest (root) oscillator modulates all the other oscillators (1→2, 1→3, 1→4, etc.)
Down
• All: Each oscillator modulates the next higher oscillator (1→2, 2→3, 3→4, etc.)
• Down: The highest oscillator modulates all the other oscillators (16→1, 16→2, 16→3, etc.)
The Cross FM jack responds to voltages from -5V to +5V. Negative voltages reduce the amount of
Cross FM
effect and positive voltages increase the amount of effect, with respect to the knob position.
Twist knob, jack, and switch
The Twist feature distorts the time base of each oscillator's period from a pure sine wave to a more
complex waveshape, a process known as phase-shaping. A simple way to hear (or see, if you have an
oscilloscope) the effect of Twist is to listen to just one oscillator by turning Balance all the way down as
you play with the Twist knob and switch.
Twist
With the knob all the way down, no distortion is applied and the base waveform is a sine wave
Ramp
(assuming no other wave-folding or modulation is present). As you turn the knob up, the sine wave
morphs into another waveform, depending on the position of the Twist switch:
Pulsar
• Ramp: morphs the phase to an increasingly steep sawtooth, and beyond
Crush
• Pulsar: compresses the phase of the sine wave to create narrow "pulses"
• Crush: bit-crushes the oscillator phase
The Twist jack responds to voltages from -5V to +5V. Negative voltages reduce the amount of effect
and positive voltages increase the amount of effect, with respect to the knob position.
Twist
Warp knob, jack, and switch
The Warp feature applies different types of wave-folding to the twisted wave, all of which modify the
harmonic content in different ways. A simple way to hear the effect of Warp is to listen to just one
oscillator by turning Balance, Cross FM and Twist all the way down while you play with the Warp knob
Warp
and switch.
Fold
With the knob all the way down, no wave-folding is applied and the base waveform is a sine wave
(assuming no other distortion or modulation is present). As you turn the knob up, more wave-folding is
Cheb
applied.
Segment
The Warp switch selects one of three types of wave-shaping:
• Fold: wave-folding inspired by analog wave-folders (maximum six folds)
• Cheb: Chebyshev polynomial-based wave-folding (maximum 16th order)
• Segment: linear (triangle-wave) based wave-shaper (8 different shapes)
The Warp jack responds to voltages from -5V to +5V. Negative voltages reduce the amount of effect
and positive voltages increase the amount of effect, with respect to the knob position.
Warp
Detune knob
The Detune knob adjusts how much the oscillators are detuned after they've been quantized. It's easy
to create beat frequencies and/or dissonance with this feature. Using the stereo outputs with a small
amount of detuning can create a lush stereo field.
Detune
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