Behringer CRAVE Guide Rapide page 42

42
CRAVE
CRAVE Getting started
Step 3: Getting started
(EN)
OVERVIEW
This 'getting started' guide will help you set up the CRAVE analog
synthesizer and briefly introduce its capabilities.
CONNECTION
To connect the CRAVE to your system, please consult the
connection guide earlier in this document.
SOFTWARE SETUP
The CRAVE is a USB Class Compliant MIDI device, and so no driver
installation is required. The CRAVE does not require any additional
drivers to work with Windows and MacOS.
HARDWARE SETUP
Make all the connections in your system. Use the rear panel
MIDI switches to set the CRAVE to a unique MIDI channel in your
system. Connect an external MIDI keyboard directly to the CRAVE
MIDI IN 5-pin DIN type input.
Apply power to the CRAVE using the supplied power adapter only.
Ensure your sound system is turned down. Turn on the CRAVE rear
panel power switch.
WARM UP TIME
We recommend leaving 15 minutes or more time for the CRAVE
to warm up before recording or live performance. (Longer if it
has been brought in from the cold.) This will allow the precision
analog circuits time to reach their normal operating temperature
and tuned performance.
OSCILLATOR VCO SECTION
The CRAVE has one main voltage controlled oscillator (VCO).
The VCO waveform can be selected from pulse or reverse-
sawtooth. When pulse is selected, the pulse width can be varied
from narrow, squarewave (center) to wide pulse. Listen to the
changes in sound that the waveforms and the change in pulse-
width make. The frequency can be adjusted up or down one
octave, and allow fine tuning to other instruments.
The VCO may be modulated either in pulse width, or in frequency.
The source of the modulation can either be the envelope as
detailed below, or the low frequency oscillator (LFO). The VCO can
also be modulated using the OSC MOD input in the patch bay.
The amount or depth of VCO modulation can be adjusted using the
OSC MOD control.
Use the MIX control to adjust the mix between the internal VCO
(fully left)and the internal noise generator (fully right). If an
external input signal is present at the EXT AUDIO input, then this
will take the place of the noise in the mix.
FILTER (VCF) SECTION
Play with the cutoff frequency, and resonance controls, and listen
to their effects on the sound.
The classic 24 dB/octave high pass and low pass filters allow a
great deal of control over the sounds created by CRAVE.
The high-pass filter reduces the level of signals that are below
the cutoff frequency. It effectively reduces the level of the
fundamental, and lower order harmonics.
The low-pass filter reduces the level of signals that are
above the cutoff frequency. It reduces the levels of the
higher-order harmonics.
The resonance control gives an enhancement to the signals at the
crossover frequency.
The amount of VCF modulation can be varied with the VCF MOD
control, and also the polarity can be reversed. For example,
if modulation increases the cutoff frequency, then negative
polarity will decrease it.
The VCF modulation source can either be the envelope or the LFO.
All these features, in addition to using the patch bay, allows for a
great deal of flexibility in sound creation.
MODULATION SECTION
The low frequency oscillator can be used to modulate the VCO
and the VCF. The LFO frequency can be varied, and the waveform
selected from square or triangular. An LED indicates the LFO rate.
ENVELOPE GENERATOR SECTION
The envelope generator can be used to modulate the cutoff
frequency in the VCF section, and the voltage controlled
amplifier (VCA). Envelope also can be used to modulate the VCO
frequency and pulse width.
The controls for attack time, sustain level and decay time,
allow you to adjust the envelope shape through a wide range.
PATCH BAY SECTION
This section allows you the versatility to create many different
sounds, with an endless variety of options and configurations.
The VC MIX control is like having a separate mini-mixer or variable
voltage source. It operates independently from the main signal
path. It allows you to adjust a mix between the patchbay MIX 1
input and MIX 2 input, with possible modulation control from the
VC MIX CV input. The patchbay VC MIX output can then be used to
connect to other inputs in the patch bay.
If there are no MIX 1 or MIX 2 inputs connected, then the
VC MIX output will vary from 0V (fully left) to +5 V (fully right).
Experiment with this by connecting the VC MIX output to an input,
and varying the VC MIX control.