Review on 🔌 UGREEN USB External Stereo Sound Card Audio Adapter: 3.5mm Aux & 2RCA Converter for Speaker, Headphone, Microphone: Plug and Play on Windows, Mac, Linux, PS5 - 3ft Cable by Ronald Wheeler

External sound cards just keep getting better. This model uses the newer C-Media CM6533 chip. The specs say it only records a mono mic signal, but I've found that it actually records in stereo with a TRS stereo signal (ignoring bias for electret mics): T = peak = left channel; R=ring=right channel; S=sleeve=contact point. Update: After contacting UGREEN tech support, they explained that the signal only looks like stereo, but the same signal is shared between the left and right channels.