Recording noise.

I do my own live recordings (vocal/guitar) on Audacity 2.0.5. I use Windows 7.

Suddenly today, when I click on “record” I now get a LOT of noise. There’s “usually” a thin, straight line along the middle of the stereo Audacity screen after I click “record” (indicating silence … till I start to sing and play). But now that thin line is dense and wavy, and a lot of noise is now there in place of the silence.

As far as I’m aware I’ve have not changed any settings on my computer or on Audacity. I’m still using the same microphone. I can’t get rid of this noise unless I turn the Audacity recording volume down to near zero.

How can I get my noiseless Audacity back? Thanks.

PS: Since I got Audacity 2.0.5 a few months ago I’ve had nothing but trouble with it, whereas my old Audacity version which I’ve used for many long years was always trouble free. Maybe I should just download an old Audacity version and hopefully return to trouble free recording again. Has anyone else found the new Audacity 2.0.5 FAR inferior regarding reliability and ease of use?

Has the recording level also gone very high?
What sort of microphone are you using and how is it connected to your computer?

We often hear that complaint. 99 times out of 100 it turns out to be a problem caused by the computer being “upgraded” and nothing to do with Audacity. Very often it is just that the upgraded computer needs a bit of setting up to get it working right, such as updating drivers. Has your computer been upgraded or changed in any way recently?