Focusrite Scarlett 2i2
Audio interface with two inputs and two outputs, supporting 24-bit/192 kHz audio. It features Scarlett microphone preamps, direct monitoring, and USB-C connectivity.
around $171
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You plug it in and it is instantly recognized by Loopy Pro. I have never really had any problems with it whatsoever. I know higher quality interfaces are out there but If your just looking for something with 2 inputs that is reliable this is a good choice to start with.