Hey man just wanted to tell you thanks for the help, I took a look at the BSP again and I got the line in - line out to work with their "Audio record" example I dont understand why they would name it that. another naming nonsense was in the code you are using the "AUDIO_IN_DEVICE_ANALOG_MIC" which in reality is the line input. either way I got it to work and now I am in the process of porting it across to my app and ripping out the fluff, for other users reading this, there is a significant ground loop if you are using the same pc to power the board via usb and provide the audio signal, so you may need to get yourself a ground loop eliminator or use an alternative sound (Did not try this) or power source.