Unplug the turntable and restart the machine. That should bring your sound back. Windows has an odd idea of what constitutes normal sound pathways. Now go into Control Panels and turn off Windows Enhanced Services. http://manual.audacityteam.org/o/man/faq_recording_troubleshooting.html#enhancements ...
If you're in Mavericks now, you have a built-in diagnostics tool. Restart the machine and hold the D key during startup . Follow the instructions for the exhaustive diagnostic. They warn you multiple times that the test could take several hours. I started mine 40 minutes ago and the progress bar is ...
You might try Effect > Vocoder. That tool combines two sounds and can give the "talking guitar" effect and other combinations. Try that with two people speaking the same words with the same inflection. The result should be completely unintelligible, but have the same vocal qualities. Also ...
Oddly, that doesn't always mean element 348 actually failed. It could mean the computer power supply took that exact instant to dive briefly. Run the suite again.
Somebody must make an appropriate memory tester. There's just nothing like having one cell in a memory stick erratic or soft. Google your brains out. That will be your gift to us if we solve this. One pass tells you next to nothing. Typically the test program is a suite of different tests with cutsy...
I'm thinking it's not the Audacity program that's the problem. I'm thinking that, too. How much room on your hard drive? These are classic symptoms of drivespace issues. Audio (and video) production eats drivespace for breakfast and lunch. How big is the main drive (C:) and how much is left or how ...