This is NOT an issue of impedance as the output impedance of most modern microphones, both passive dynamic and active condenser, are rather low (100s of ohms). Your experiment vividly demonstrates this problem. But that dynamic mic (Shure SV100) is rather low-level output and will not work very well with 'computer type' microphone inputs of any kind, internal or external. Will that be the reason? What about impedance?Ĭomputer microphone inputs, both the built-in kind and the external USB kind, are designed to be used with relatively high-output electret condenser microphones. Now I think that the USB card ignores the mic due to its low output. But when checked with Audacity in stereo recording mode, both mics produce (of course without the USB card) output in the same track.

With the sound card, the cheap one works and Shure SV100 doesn't.įirst I thought the problem would be of the pin which fails to convert the mic output to the correct channel. In short, without the USB sound card, both mics work, but with noise. This pin is functional while using with the built-in sound card (except that it produces a low output and a lot of noise). The mic comes with an XLR to 1/4' cable, which I connected with a 1/4' to 1/8' converter pin in order to connect it with the sound card. It works well with my cheap desktop mic, service almost zero noise at 100%.īut the problem is, it fails to detect my Shure SV100 mic (which was the actual one that I bought this card for). I recently bought a cheap USB sound card, which seems to be using the chip CM108. I'm still not sure whether this is the right forum to ask this question.

Usb mic sound card