Using MIC on A10s under Android

[kbro]

I've drawn a blank trying to get an audio recorder app to pick anything up from the MICIN1 and MICIN2 inputs in my A10s board using the stock Android 4.0.4 image that was pre-installed on the 4GB NAND memory.  Rather than connect a microphone I simply tried connecting an audio source between MICM (pin 7) and MICIN1 (pin 6) on the MIC/TV connector, having soldered a row of jumper pins into the holes.

If you can point me in the right direction I'm be grateful.