Behringer DEEPMIND 12D Manual - Page 78
Operation Of The Keyboard Split
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78 DeepMind 12D User Manual OPERATION OF THE KEYBOARD SPLIT 1. In first example, the first DeepMind unit can play the notes that are below middle C. 2. The second DeepMind unit can play the notes that are middle C and above. 3. Each unit can play its own program, and the volume of the audio output from each unit can be adjusted with the volume controls, or the external audio mixer. 4. To exit the KEYBOARD SPLIT mode, turn the KEY-RANGE OFF in each CHAIN PARAMETERS menu. 8.5 VCF The VOLTAGE CONTROLLED FILTER (VCF) is an advanced filter designed specifically for the DeepMind 12D. The VCF filter changes the tone color created by the OSCs and NOISE generator by cutting off, or emphasizing frequencies/harmonics. The VCF stage allows the low frequencies to pass, and cuts off higher frequencies. This approach is used by many classic subtractive synthesizers. The VCF is a fully analog filter, with the ability to be switched from a 2-pole/12 dB per octave filter to a 4-pole/24 dB per octave filter. The dB per octave refers to the angle of the filter's slope/response curve. The VCF also has adjustable resonance which creates a narrow peak around the filter cut-off frequency. The DeepMind 12D filter is capable of being driven into self oscillation when the resonance setting is high. Unlike many other synthesizers, the DeepMind 12D is capable of accurate pitch tracking even when the filter resonance is pushed to (and past) the point where the filter starts to self-oscillate. The self-oscillation is tuned so that you can play it as a fully polyphonic 3rd oscillator across the entire range of playable notes. The VCF can be modulated dynamically by the VCF Envelope, LFO or Keyboard Tracking. The VCF Frequency is also available in the Mod Matrix as a destination where it can be modulated from any of the Mod Matrix sources. 8.5.1 VCF FREQ FADER • The VCF FREQ fader controls the cut-off frequency of the VCF. The VCF will begin cutting frequencies below the cut-off frequency and continue to cut them at a rate depending on the number of poles used. You can use the filter to sculpt the sonic characteristics of the OSCs and noise generator, or you can dynamically adjust the fader to create sweeps of the filter which will create distinctive movement. Modulating the cut-off frequency with sources such as an envelope generator, with fast attack settings can help emulate the attack transients of natural instruments, or be used to creative effect.