Behringer CAT Mode D'emploi page 7

12
CAT
VCF Filter Section
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VCO1 AUDIO switch, when in the OFF position, takes VCO1
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completely out of the final audio mix.
KEYBOARD CONTROL knob determines how closely the
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keyboard controls the low-pass filter cutoff frequency (F
VCF F MODULATION SOURCE switches select waveforms
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C
to modulate the VCF cutoff frequency.
MODULATION DEPTH knobs control the amount of
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waveform applied to the VCF cutoff frequency.
F (FILTER CUTOFF) slider controls the low-pass filter's
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C
cutoff frequency. The filter will cut off more and more
treble frequencies as the slider is moved downward. At the
full upper setting, no treble frequencies are being cut off.
Q (RESONANCE) slider affects the low-pass filter's timbre
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by emphasizing harmonics around the cutoff frequency.
At the full upper setting, the VCF will oscillate and no other
sounds will come through the filter.
TRANSIENT GENERATORS Section
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The ADSR (Attack-Decay-Sustain-Release) transient generator
creates a detailed voltage transient every time a key is depressed.
The voltage transient is shaped by the ATTACK, DECAY, SUSTAIN
and RELEASE sliders, and the ADSR voltage transient is available at
all switches marked .
ATTACK slider controls the shape of the note attack up to
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an initial fixed peak when a key is depressed.
DECAY slider controls how quickly the envelope drops
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from the initial fixed peak.
).
SUSTAIN slider controls the level at which the envelope
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C
holds after the initial decay following the fixed peak.
RELEASE slider controls the envelope shape following the
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key release.
The AR (Attack-Release) transient generator works similarly to the
ADSR generator, but with less detailed control over the transient
envelope. The AR voltage transient is available at all switches
marked .
ATTACK-RELEASE sliders control the transient slope for
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when a key is depressed (ATTACK) and when that key is
released (RELEASE).
ADSR REPEAT switch causes any ADSR setting to repeat
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at a speed determined by the LFO. In the GATED position,
the transient will only repeat while the key is held down.
In the AUTO position, the transient repeats even if the key
is released.
SAMPLE + HOLD switch selects the source that will be
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sampled by the automatic Sample-and-Hold function.
In the VCO1 setting, the VCO1 mix setting will be sampled.
In the NOISE position, the noise generator output is
sampled to produce a random output pattern.
LFO DELAY slider controls the amount of time it takes for
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the LFO SINE wave output to reach its maximum after a
key is depressed.
Additional Controls and Connections
(42) (41) (37) (38)
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(43) (44) (45) (46)
POWER LED lights up to show the unit has been powered on.
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KB CV jack routes keyboard control signals to
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external devices.
GATE jack sends out an internal control voltage signal.
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ADSR jack sends out an internal control voltage signal.
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AR jack sends out an internal control voltage signal based
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on the current settings of the ATTACK-RELEASE sliders.
GATE routes in external control voltage signals for the
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GATED setting of the ADSR REPEAT switch.
VCO1 CV routes in external control voltage signals for the
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VCO1 and VCO2 frequency setting.
VCO2 CV routes in external control voltage signals for the
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VCO2 frequency setting.
VCF Fc routes in external control voltage signals for the
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VCF Fc setting.
VCF Q jack routes in external control voltage signals for
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the VCF Q setting.
EXT. AUDIO input connects any external line-level audio
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source to this 3.5 mm input.
VCA CV jack routes in external control voltage signals for
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the VCA VOLUME control.
PHONES jack connects to headphones with a 1/8" TRS
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stereo connector.
MAIN OUT uses a 3.5 mm TR connection to output the
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main audio output. Typically it can be patched to the
audio input of another CAT or to the audio inputs of other
modular synthesizer equipment. If you are using the CAT in
a Eurorack, then this is the main output, as the rear panel
output connectors are not used.
Other Controls
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VCA switch determines whether the VCA uses an ADSR
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(Attack-Decay-Sustain-Release) transient envelope or
an AR (Attack=Release) transient envelope. The BYPASS
setting completely bypasses the VCA so that the sound
level on the output is constant.
VCA VOLUME knob controls the final output volume.
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NOISE LEVEL slider controls the amount of white noise
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mixed into the VCF.
MIDI Section
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USB PORT allows connection to a computer over a USB
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type B connection. The CAT will show up as a class-
compliant USB MIDI device, capable of supporting MIDI
in and out.
MIDI IN receives MIDI data from an external source over
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a 5-pin DIN connector. This will commonly be a MIDI
keyboard, an external hardware sequencer, a computer
equipped with a MIDI interface, etc.
MIDI THRU uses a 5-pin DIN jack is used to pass through
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MIDI data received at the MIDI INPUT. This data will
commonly be sent to another synthesizer to run a
Poly Chain or to a drum machine assigned to a different
MIDI Channel.
13
Quick Start Guide
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