ご質問: Can I use the microphone if I select 6 speakers in C-Media Audio Configuration?(5/9/2003) 答え: If you select 6 speakers in C-Media Audio Configuration for 5.1 CH output, all three audio connectors (Line in, Line out and MIC) are defined as output connectors.
Microphone is an input device. So you are not able to use the microphone at this moment.