I have a 3rd generation Scarlett 2i2 USB Audio Interface. It has two inputs and two outputs. The two inputs are treated as stereo mics by default. Settings -> Sound -> Input shows one device: "Analog Input - Scarlett 2i2 USB". However, I want to have the two inputs to be separated so I can pick either one in an app.
For example, in Firefox, when something wants to use the mic, I can choose the 2i2 and both inputs will be used. I want to be able to send either the left or the right input to an app, but not both.
How would I change Pulse / Alsa so that the Audio Interface is split into two Virtual Input Devices, one with the left input, one with the right?