Aphex IN2 - Manual (Page 5)

You should now see signal on the input and output meters and hear yourself in
the IN2 headphones or speakers.
Steinberg Cubase
Launching Cubase will bring up the Steinberg Hub.
Under Projects, select Empty.
Use the default location, name your new project and click Create.
Go to Devices-Device Setup.
Under VST Audio System, select IN2 from the drop down menu.
You will be prompted, “Do you want to switch driver?” Click Switch.
Set Audio Priority to Boost.
Click Apply, then click OK.
Go to Devices-Device Setup again.
In the left column of Devices, click on Aphex IN2.
In the new window on the right, click on Control Panel.
Set the Buffer Size to 64 Samples. (If you hear pops and clicks in your audio,
come back and set the I/O Buffer Size to 128. Set this as low as possible without
hearing pops and clicks.)
Click Close, then click OK on the bottom right.
Go to Devices-VST Connections.
Under Inputs, click Add Bus.
Select 1, mono and click Add Bus. You will now see Mono In, Audio Device IN2,
Device Port IN2 Analog 1.
Click the Outputs tab.
You should see Stereo Out, Audio Device IN2, Device Port IN2 Analog 1 and IN2
Analog 2.
Go to Project-Add Track-Audio. Leave the default settings and click Add Track.
Click the red circle (Track Arm) on your track.
Click on the Speaker icon.