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The Oscillator Section > Altering the Oscillator Playback - Pg. 224

Kbd (keyboard tracking)--When this parameter is activated, it will enable the filter to react differently the higher you play on the keyboard. If this parameter is deactivated, the filter effect will remain constant. Env (envelope)--When this parameter is activated, the filter will then be modulated by the Filter Envelope. Freq (Cutoff Frequency)--This parameter has two purposes, depending on which filter type is selected. When LP24, BP12, or Comb+/­ is selected, this parameter acts as a cutoff frequency knob that specifies where the filter will function within the frequency spectrum. When the AM Filter Type is selected, the Frequency knob will control the frequency of the ring-modulated signal generated by the AM filter. Res (Resonance)--This parameter has two purposes depending on which filter type is selected. When LP24, BP12, or Comb+/­ is selected, this parameter emphasizes the frequencies set by the Freq knob. When the AM Filter Type is selected, the Resonance knob regulates the balance between the original and the modulated signal. The Filter Envelope The Filter Envelope is used to alter the characteristics of Filter A, Filter B, or both. The main parameters of the envelope match those of the Oscillator Envelopes, so there is no need to review how Attack, Decay, Sustain, and Release work (see Figure 10.12). The additional parameters for the Filter Envelope are as follows: Figure 10.12 The Filter Envelope can be used to create long, sweeping effects for pad sounds, or bubble-like sweeps for bass synths. Inv (Inverse)--This button is used to invert the individual parameters of the Filter Envelope. For example, say you are using the Attack parameter of the Filter Envelope and have assigned a positive value of 80, which produces a very slow attack. Activate the Invert button and the attack parameter is inverted, which means the attack will be much faster now. Amt (Amount)--This knob is used to assign the amount of envelope to the filters. The Shaper Aside from the obvious auditory goodies that the Filter section provides, my favorite part has to be the Shaper. The Shaper is a waveshaper, which alters the waveform shape itself. This results in either a more complex, rich sound or a truncated distortion that rivals Industrial Music on a good day. The Shaper is activated by clicking on its power button, located in the upper-left corner of the Shaper interface. Once activated, you can edit the waveshaping effect by selecting a mode and assigning an amount.