Im using Audacity 1.2.6 and i'm having issues reocrding guitar. First of all, im running my Line 6 amp from the record out directly into my soundcard, and when i go to record guitar, for the first 20 seconds or so, its fine, but anything after that has a very compressed chipmunked(?) kind of sound, and the volume level is greatly reduced, thusly rendering the track useless. all my volume settings are at acceptable levels, as i never changed them from previous recording projects, all of which were fine. I have no idea how or why this problem came about. any help or advice would be awesome.

Please help.

I didn't find the right solution from the Internet.