Behringer SYSTEM 15 Quick Start Guide - Page 8

14 SYSTEM 15 Voltage Control (modulation) 921 Aux Sine Output 2nd 902 Signal Output 2nd 911 Output 2nd 902 Signal Input 921B DC Mod Inputs via Multiple 2nd 902 Control Input This patch allows a delayed vibrato effect to fade in when a note is held. The external keyboard controls the pitch and triggering of notes via the CM1A MIDI Interface. As this can be switched between v-trigger and s-trigger then s-trigger should be selected and the 961 Interface need not be used. Pitch CV is fed to one of the 921As, which daisy chain to the 921B VCOs. The selected waveform from each oscillator is fed to the CP3A-M mixer; which then feeds the 904A LPF. S-triggers are fed to a multiple, and then to the 911s' s-trigger inputs The output of the 904A LPF is fed to one of the 902 VCAs, which feeds out to your mixer, amplifier or DAW. This VCA is controlled by the first 911 EG. The second 911 EG controls the second 902 VCA. The second 902 VCA signal input is fed from the 921 LFO. Its output is fed to one of the CP35 multiples, whose outputs feed the DC Modulation inputs of the 921B VCOs The second 911 should have a long attack time and full sustain. So long as the first 911 has a long sustain time, when a note is held a vibrato effect will fade in slowly. When notes are played legato there is little or no vibrato Space Rock Quick Start Guide 15 The 921 should be set to 'Sub' - this is the main modulation for the self-oscillating filter, and manual alteration of the Frequency control helps to produce the classic sound. The pink noise feeding the 904B produces a swept wind effect, that can be altered with the Fixed Control Voltage Altering the Fixed Control Voltage of the 904A also produces interesting effects The CP3A-M balances the two signals, as an alternative feed the outputs of the two filters direct to two mixer or amplifier channels. Both sounds benefit from a lot of echo! Expressive Lead #2 To mixer/ampli er/DAW This patch creates two of the classic 'space rock' sounds, and allows them to be mixed together. Source 921 Sine Wave Output 921A Frequency Output 1st 921B Sine Wave Output 2nd 921B Sine Wave Output 923 Pink Noise Output 904A Signal Output 904B Signal Output CP3A-M Output Destination 904A Control Input 2 x 921B Frequency Link (in series) 904A Control Input 904B Control Input 904B Signal Input CP3A-M Input 1 CP3A-M Input 2 Your mixer, amplifier, DAW Control settings are very important for this patch. Regeneration on the 904A must be set to 9 or 10 to force the filter to self-oscillate The 921A should have Octave selected and the frequency control set to -6 The 921Bs should be set to 'Lo' - these oscillators provide the sweep to the filters To mixer/ampli er/DAW MIDI Out This sound uses Pulse Width Modulation to a pair of oscillators, one of which should be slightly detuned to fatten the sound. Voltage Control (pitch) Source External MIDI Keyboard - MIDI Out 921A Frequency Output 921A Width Output Audio Destination CM1A MIDI Interface MIDI In 921B Oscillator Frequency Link (in series) 921B Oscillator Width Link (in series) 2 x 921B Square Wave Output CP3AM Output 904A Signal Output 902 Signal Output Voltage Control (Amplitude) CP3A-M Inputs 1 & 2 904A Signal Input 902 Signal Input Your Mixer/Amplifier/DAW CM1A s-trigger Output via Multiple 1st 911 Output Voltage Control (Modulation) 2 x 911 s-trigger Input 1st 902 Control Input 921 sine wave Output 921A Width Link 2nd 911 921A Width Input 2 x 921B Width Link (in series) 904A Control Input The detuned 921B VCOs give a fat sound, whose timbre changes constantly at the speed of the 921 sine wave - the 921 should be in Sub mode, speed can be adjusted to suit. The sound comes from the 904A LPF, whose Fixed Control Voltage and Regeneration can be set to whatever suits your aim, plus modulation from the second 911 EG. EG settings can be adjusted to suit for the main part of the sound, although medium to high levels on T2 (decay), T3 (release) and E sus(tain) are recommended. The second EG should have a medium length T1 (attack), medium T2 (decay) and minimal T3 (release) and E sus(tain).