imic usb audio interface imic was the original usb audio adapter that enabled mac and pc users to add stereo input and output to their usb computers that, otherwise, lacked the necessary hardware support. imic allows you to connect virtually any microphone or sound input device to your ibook, powerbook, powermac or other mac or pc systems with a usb port. imic supports both mic and line level inputs via a selectable switch, as well as a variable level output for connecting speakers or headphones. imic's audio is superior to most computers' built-in audio because it uses usb for the audio signal. usb isolates the audio signal from the noisy electronics in your computer, giving you higher quality sound when you record, and higher quality sound output for external speakers.