I recently bought a USB sound card to improve the audio output on my pi while continuing to use my USB microphone for audio input.
The problem is that I do not know how to configure the pi to use the USB sound card as the default for audio out while continuing to use the separate USB mic for audio in. The USB sound card technically has a 3.5 mm mic in but I would rather not buy another microphone (non-USB) just to get this working.