No External Microphones Working!
We've had a bit of an odd one come up recently, students are trying to do audio recording with external 3.5mm microphones but as soon as the microphones are plugged into the microphone jack (not headphone!) the levels drop to the point where the recording is essentially silent.
Recording via an internal microphone (where available) works fine. I've done a test in SoundBooth recording alternating between internal and external (through the one soundcard listed) and you can see the levels drop right off as soon as the external mic is plugged in.
It happens across a wide range of hardware all running Windows 7, all with the latest drivers and still happens with the default Windows driver. This occurs in SoundBooth, Sound Recorder, Audacity and even in the sound options in Control Panel.
When the boxes where running on XP the recording was fine, no issues.
I know the microphone works because there are no issues when recording on OS X.
I've haven't had the chance to really look at this but wondered if anyone had anything similar.