Hi everyone, I’m a new user so excuse me if the problem I’m having has been already solved.
I’m using Audacity 2.0.4 on Windows XP. I downloaded the program about two weeks ago and now I’m quite confident with the interface. However, there’s a problem I tried to solve in many ways but I didn’t succeed: while recording with my keyboard, if I play chords that are quite loud, the first seconds of the recording are ok, but after a while the sound recorded by Audacity starts lowering its volume. That’s quite annoying and I really want to know if there’s a way to fix it.
Thank you a lot 
That will be Windows sound “enhancements” trying to help you. Turn off the “enhancements” (See: Audacity Manual)
Also, be aware that XP is no longer supported by Microsoft, which makes it a dangerously insecure operating system. If you can’t or don’t want to update to a later version of Windows, you may want to consider using a modern Linux operating system.
Ok, thank you 