10.6

134Logic Pro Instruments
• Tube knob: Use to simulate the warm distortion effect of an overdriven tube amp.
• XCite knob: Use to create distortions with an enhanced high-frequency range.
• Pre Gain knob: Set the amount of input gain applied before the distortion effect. This
enables you to produce heavily saturated distortions with some distortion types,
especially Tube.
• Post Gain knob: Set the output level to compensate for significant signal boosts caused
by distortions such as Tube and Mech.
Alchemy MultiMode Filter effect parameters
Provides multiple filter types that process all voices routed through the effects section.
• Type pop-up menu: Choose from dozens of different filter types. Each has a unique
characteristic. See Logic Pro Alchemy filter types.
Note: The knobs described are common to most filter types but not all.
• Cutoff knob: Set the filter cutoff frequency.
• Resonance knob: Set the filter resonance or emphasis. Higher settings boost
frequencies in the immediate vicinity of the cutoff frequency.
• Drive knob: Overdrive the filter. The precise effect varies with each filter design.
• Mix knob: Determine the wet/dry balance (0% = dry only; 50% = equal mix; 100% = wet
only). Typically this is left at 100%.
Alchemy Three Band EQ parameters
Offers three bands of parametric EQ. Each band, shown as F1/F2/F3 (where F denotes
frequency), has identical controls.
• Gain knobs: Set the amount of boost or cut to the three frequency bands.
• Freq knobs: Set the center frequency for the three frequency bands.
Note: The three frequency bands can each be set to values from 16 Hz through to 20
kHz, so it isn’t necessary (although it may be useful) to tune F2 above F1, or F3 above
F2.
• Q knobs: Set the bandwidth of the three frequency bands.
Alchemy Waveshaper parameters
An EQ unit that applies a predefined filter shape. Two sets of identical controls can be used
to modify the pre-shaped and post-shaped signal.
• Mix knob: Set the balance between the dry input signal and the wet effect signal.
• Gain knobs: Set the amount of boost or cut to the pre- or post-filtered signal.
• Shape knobs: Set the pre- or post-filter shape toward a lowpass or highpass type. The
center position has a balance of low and high filtering.
• Freq knobs: Set the center frequency for the pre- or post-filtered bands.
• Display: View and edit the predefined filter curve. Drag the white handles to set the
shape start, mid, and end points. Drag the line between points to create convex or
concave curves. Option-click the line to reset it to a linear shape.