Hi! I’ve got a large file that has some scattered “bleeping” of offensive words. The bleep tone is far too loud, so I want to find their time locations and simply delete the bleep tones manually where they exist. I tried analyzing for clipping, but none was found. I plotted the spectrum and found some frequencies that might be the bleeps, but if that tool tells you where in time those frequencies exist, I haven’t been able to find that info.
I’d try searching for sound (Analyze → Sound Finder), but I don’t know where to find a sample bleep for it to search for. Like I say, it’s a long file and it could well take a couple of hours before I find one.
First I had to figure out how to specify the tone to search for. Am I correct in concluding that I first generate a tone at the desired sine frequency, copy it to the clipboard, and perform the Find Sound search? That produced a new windows labeling where that frequency was found. However…
Note that I’ve learned that there are at least three different frequencies commonly used for bleeps: 400 Hz, 480 Hz, and 1000 Hz, all sinusoidal. When I’ve tried any of the three, the results aren’t what I was hoping for. The labels apparently indicated everywhere those frequencies occurred, even when the freq in question was simply a component of the audio at that point. So not only did it produce almost a thousand labels, when I played a few dozen chosen at random, the bleep sound was not heard there.
Do you have any suggestions for the Find Sound parameters that would help? The bleep tones I generated were half a second long, which seems appropriate, but perhaps I should choose a different duration? That doesn’t seem likely to help, though.