Custom Dial and Cab Sim Switch – Help Center

The Custom Dial on BIAS Head/Rack lets you assign any BIAS Amp Software parameter directly to the front panel for real-time control. The Cab Sim Switch toggles the cabinet simulation in your signal chain.

Custom Dial

The CUSTOM dial can be assigned to any parameter in BIAS Amp Software. By default, it controls the Noise Gate threshold — determining when the gate activates to cut unwanted noise.

Custom Dial

How to Configure the Custom Dial

Desktop

Connect BIAS Head/Rack to your computer via USB, then click the settings icon in the top right corner of BIAS Amp Software.
A list of assignable parameters will appear. Select any parameter — from preamp Hi/Low cut frequencies to BIAS Adjust for preamp or output valves.

Mobile

Connect BIAS Head/Rack to your iPad/iPhone via Bluetooth, then tap the settings icon in the top right corner.
You will see the Noise Gate option — active by default. The Custom Dial is also set to Noise Gate threshold by default.
Scroll down and tap Custom to see the current assignment.
A list of all available parameters will appear. Select any parameter to assign it to the Custom Dial.

Cab Sim Switch

The CAB SIM applies either your own custom IR (Impulse Response) or a cabinet from BIAS Amp Professional Software. Useful when playing through an external cabinet or recording direct in a studio.

Flick DOWN to disengage cabinet simulation — LED turns OFF.
Flick UP to engage cabinet simulation — LED turns ON.

When using an external cabinet, start the Custom Dial at minimum and slowly turn clockwise to find a comfortable level.

Example: Assigning Reverb to the Custom Dial

A popular use case is assigning a Reverb parameter to the Custom Dial for real-time reverb control from the front panel. BIAS Amp 2 offers 9 Reverb styles and 6 adjustable parameters.

Desktop (BIAS Amp 2)

Ensure BIAS Head/Rack firmware is updated to V.0.6.3.198 or later.
Launch BIAS Amp Desktop and open Custom Knob under the settings menu.
Change the assignment from Noise Gate to any Reverb parameter.
Adjust the Custom Knob on your BIAS Head/Rack to control reverb in real time.

Mobile (iPad/iPhone)

Connect BIAS Head/Rack via Bluetooth and open BIAS Amp 2.
Go to settings and tap Custom Knob.
Change the assignment from Noise Gate to any Reverb parameter.