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What is a usb audio interface7/3/2023 ![]() The input of the standard audio interface on a PC is not designed for connoisseurs. With many microphones, you can put in a battery instead - but it's an extra thing to worry about. Your PC's 3.5mm microphone socket won't provide phantom power. You can expect the XLR sockets on USB audio interfaces to provide phantom power - but check the specifications before buying. Condenser microphones need power, and usually the most convenient way to get power to the mic is phantom power, whereby a small current is carried on the signal lines of the cable. ![]() However, it's potentially an $8 spend that would allow you to make-do without a USB interface. These are not all that common, and I see anecdotes on the internet about many of them being incorrectly wired. You can get XLR to 3.5mm cables, such as this one. So if you don't buy a suitable audio interface, you have the issue of physically plugging stuff together. Your computer's microphone input will be a stereo 3.5mm socket. Many USB audio interfaces have XLR sockets (but check that the one you choose does). These have three wires arranged so that any interference picked up in the cable is cancelled out. ![]() Good quality microphones usually have XLR connectors. Let's instead talk about the various factors you have to consider.
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