New here and new to audacity. I have an audio file, and it is an interview with someone, however there are people speaking in the background. Because of them, I cannot properly hear the interview.
Attached is a screenshot.
I already removed background noise with Effect-Noise reduction.
Right. Comic-Con 30 years ago in some Mexico border town.
As you noticed by now, Noise Reduction can’t help with sounds that are constantly changing, like voices. Sometimes you can get the background murmur to dip like that because on average, it doesn’t change.
Noise Gate isn’t going to help because some of those voices are as loud as he is. Even if you do get marginal improvement, it’s going to butcher his voice.
I think there are some expensive AI techniques in the works which can “learn” his voice and suppress everything else. It’s a cousin to environment suppression on cellphones. The down side is sounding like a bad cellphone.
There’s a fuzzy rule that Audacity can’t be used to split apart individual voices, instruments, or sounds from a mixed performance. That’s pretty much exactly what your job is.
That was then. Now, we’d be using a narrow acceptance shotgun on the camera.
…or hand-hold an even more narrow shotgun.
We need to thank Ira Glass for that last one. Everybody was horrified when he started doing close interviews with a “distance” microphone. They stopped being horrified when his interviews worked out repeatedly in noisy environments.