Program reconfigures input

I’ve used Audacity for several years now, but just recently ran into a new problem. When recording from any source, the program reconfigured the input so as to reproduce in a muffled, almost truncated sound, although the tempo is not compromised. Notice in the image below how the wave form is quite narrow. I have even uninstalled and reinstalled the program several times, but to no avail: even the newly installed version, 2.0.2, fails to record/reproduce correctly.

Try turning off Windows and sound card sound effects and enhancements: .