10.6

28Logic Pro Effects
Use the Logic Pro Bass Amp Designer D.I. box
The D.I. box is modeled on a highly regarded American D.I. unit.
D.I. box parameters
• Boost knob: Set the input gain of the D.I. box.
• HF Cut button: Turn on a highpass filter. This is used to reduce noise.
• Tone knob: Set the tonal color of the D.I. box. Each number represents a preset
EQ curve.
• 1: An EQ curve with a -6 dB scoop from 100 Hz to 10 kHz, most pronounced around
800 Hz. Suitable for acoustic and string instruments, electric bass, and keyboards.
• 2: An EQ curve with a very pronounced -24 dB v-shaped notch from 100 Hz to 10
kHz, centered around 800 Hz. Suitable for electric bass guitar.
• 3: An EQ curve with a -3 dB scoop from 100 Hz to 10 kHz, most pronounced
around 800 to 1200 Hz. Suitable for acoustics, strings, electric and bass guitar,
and keyboards.
• 4: An EQ curve with a -3 dB scoop from 1 kHz to 10 kHz, most pronounced around
8 kHz. Frequencies between 60 Hz and 1 kHz have a slight boost of 1 or 2 dB above
unity. Frequencies above 10 kHz have a +3 dB boost. Suitable for acoustics, strings,
electric and bass guitars, and keyboards.
• 5: A sloped EQ curve that ramps up from -24 dB at 10 Hz to + 3 dB at around 900
Hz. Suitable for acoustic and electric guitar.
• 6: A sloped EQ curve that ramps up from -24 dB at 10 Hz to +3 dB at around 900
Hz. The signal rolls off by approximately 6 dB between 10 and 20 kHz. Suitable for
electric and bass guitar.
• Tone on/off button: Turn on the tone control.
• Amp button: View the Amp interface and parameters.
• Blend slider: Drag to hear the D.I. box alone or in parallel with the amplifier.
• Direct Box button: View the Direct Box interface and parameters.