A direct box (also known as a D.I. box) is a device used in recording studios to connect the output of an electric instrument directly to a mixing console, without using an amplifier. The direct box in Bass Amp Designer is modeled on a well-regarded American device.
Click the Direct Box button at the bottom of the plug-in window.
To show the amp again, click the Amp button.
Boost knob: Rotate to set the input gain of the direct box.
HF Cut button: Click to turn the highpass filter on or off. The filter helps to reduce noise.
Tone knob: Rotate to set the tonal color of the direct box to one of the preset EQ curves:
1: A 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: A 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: A 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: A 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 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 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: Click to turn the tone control on or off.
Drag the Blend slider all the way to the right.
Drag the Blend slider all the way to the left.
Drag the Blend slider to any central position between the left and right edges.