seems there is something wrong with the pin config.
Nothing wrong with the pin config. Use the motherboard pink port for ambient noise reduction option. The Line In label appears when the front panel pink port is connected and does not support the ambient noise reduction option. Due to an AppleHDA.kext issue, switching does not occur when the external mic in pin config loads. Note, non native hardware has no support for ambient noise reduction.
Errors on the attachments.