Audacity suddenly has noise! It was not there before!

Hello,

I am writing this message after a particularly tough day and I am somewhat stumped by the issue that appeared basically out of nowhere.

So

I have a laptop Asus TUF (God knows which details), used maybe for 2-ish years now.

Mic AT4040

Audio interface - Behringer UMC 22 well worn and repaired once (dear god I hope this ain’t the cause)

A home-made booth.

And that is basically it.

For some reason, out of nowhere, on this very night my noise floor just lept with a with a very specific hiss just going wild. This is unique because my noise removal software that I feed a V E R Y specific clip of noise barely does anything to lessen it.

I have not performed any updates, not performed any change to software, swear to god I did not even turn the bloody thing off from the last time I used it. I unplugged the charger, restarted my bloody audio interface. Nothing fixes it.

I have this. The second piece was lightly denoised and recorded 2-3 days ago, with everything being the same. I mentally exhausted and this is the last thing I wanted to happen to me today. Alas. You have any ideas friends? Thank you

I can hear a low level hiss that is around -60dB RMS. Is that the noise that you are referring to, or something else?

My audacity showed me going above 57 a bit more. but you can definitely hear a difference between the two recordings, right? I am not completely off my rails, right?

The second recording looks like a noise-gate has been applied …


https://manual.audacityteam.org/man/multi_view.html

Noise-gate “audio enhancement” can occur before the sound gets to Audacity.

That I can explain,
I am not using noise get at all. That is all basically a result of me manually editing the recording (bloody hell that does look like noise gate)
I am using a quietened section that I put between the…whatchamajig…the like proper recorded audio, I am sorry, audio terminology and I are not close friends. XD. Mostly when you know, the lads outside get a little too rowdy, the last thing I want is to have some random background clatter contaminating my recordings, or 10or so seconds of nothing being between each take.

Hmmm

I used audacity’s built in noise reduction tool
reducing the noise with minus 5 DB

I got an on the situation, uptade :

Electrical interference, while not completely off the table, seems unlikely, I turned off all lights, uplugged the charger, nothing changed.

I think this is an interface issue, as upon testing two Audio Technica Microphones + a built in mic of the laptop - both microphones gave me the same noise (plus something I should mention is that the gain seems to have weakened on the interface, the gain knob positions that would clip me to high hell now record more or less normal levels of audio), regardless of which usb port I use. My Behringer UMC22 did serve me for a few years though, so salutations to that lad.

Might be that audacity is getting old? IDk, might update it later too.

Right now - I need an extra audio interface to test it out, how am I gonna do that? God only knows XD. Thanks to everyone who helped me out to find out what is wrong btw.

Check you’ve not accidentally shifted the mic level slider: the inconspicuous white disc …

image
https://manual.audacityteam.org/man/meter_toolbar.html#recording

A not technical suggestion based on the mistake I made when posting a few image and audio stock on TikTok: disable the playback sound before replaying your file in a media player, and save the file again (now with sound off).