What is the PC setup for recording specifications and gear used by you?
Is there a option in the sound card options to "record what you hear?"
What method of recording are you using?
example: microphone for acoustic Guitar? electric guitar Direct or mic'd amp, or direct amp? Input? USB?..ect...check the mixer applet for your audio device, to make sure nothing is crossed over, or sent to Aux...?
Are you using speakers for the drum playback or head phones?
just some things to think about...you may solve it on your own...but once you post more info...well people can help, the more you reveal.
As for 12 hours of pulling hair out....that could be a condition a Doctor should be notified of....But my solution may not be your solution....Need mead?....well LOL...with you it may not be a option?.