Sort of flutter noise removal

Audacity 3.2.0-alpha-20211221 (I just compiled it from source.) Ubuntu 20.04.3 LTS
I recorded the source from a cassette tape from 1990 using audacity (2.3.3-1build1) and then changed to the alpha version. The recording has several things done to it to filter out noise and improve the sound. I just have no idea how to remove this “fluttering” sound. I included a bit of the recording before the “flutter” starts and ended it before it stops. It starts at about 1.6s into the attached recording and ends after the attachment for a total of 10.421s. Is there some way to remove it and leave the spoken words?

The motorboating sound is made up of a bunch of individual tones that have odd relationships to each other.

In Hz. 100, 125, 150, 180, 200, 225, 250, 275, 325, 350, etc, etc.
They don’t end there. That’s just where I stopped measuring.

If you have a couple of weeks free, you can apply Effect > Notch Filter at each tone and see what happens. Listen carefully as you go and make sure the voice quality doesn’t take a dive.

In my opinion, the motorboating is so rich in tones, multiples, and variations that it’s now a performer in the show. I don’t think the voice will survive the surgery. I started patching at about 4-1/2 seconds.

Screen Shot 2021-12-22 at 12.21.10 PM.png


Sorry about that post. Never mind. Something messed up the processing and added that noise to the recording. I just listened to another version I saved and it is not present. This can be marked as solved.