Static Sound Appeared After Editing

Newbie here- use Audacity at a fairly basic level to edit easy 30 minute podcasts.

I have a file I started editing. Sound was good and I was plugging along through it. At one point (About 10 mins in), I did try to adjust audio using filter curve and adding Treble Boost, trying to get a more solid sound.

When I walked away for a few minutes and came back to start editing again, I heard static, but only when I am talking (can’t use the noise reduction trick). This wasn’t there before.

I restarted the computer. Still there.

I have no other open files or programs. At first I thought it was headphones, but I removed them and its still there. Then, I thought maybe if I save a file and reopen it, it will be clear again, but it is not.

What’s baffling, is the audio was clear. Even the first 10 minutes which I edited and added music, intro etc., was in good shape. Now it’s full of static.

Any ideas? I don’t mind recording over if I have to- just trying to learn from mistakes or what may be happening here.

Please attach to your reply, a few seconds of the recording in WAV format, so that we can see what sort of “static sound” it is.
(See: https://forum.audacityteam.org/t/how-to-post-an-audio-sample/29851/1)

See attached sample!

Thank you!

Your attachment didn’t work, but did the waveform [u]show red[/u] (clipping = distortion)?

The waveform looks completely normal- no red.

(

I tried to re-attach sample to see if that works.)