UPS Flight 2976 cockpit voice recording recreated from spectrogram.

Owen Lucas

Owen Lucas

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The NTSB report for UPS flight 2976 included a spectrogram of the cockpit voice recorder audio.

Someone was able to run the spectrogram through an AI model and turn the image back to audio.

It's not an impossible task, likely any university lab could have accomplished this previously on the 40 year old voice visualizer algorithm with some custom coding. What made this news worthy is someone got an off the shelf script, ran the hi-res image through AI, and recreated the voice recording with 10 minutes of compute.

The NTSB took their docket offline supposedly to scrub spectrograms.
 
I watched the Scott Manley video about it. He was the one that speculated that it was possible. I don't remember if someone did the actual voice audio or if it was the NTSB test audio they figured out it could be done on.
 
jhellwig said:
I watched the Scott Manley video about it. He was the one that speculated that it was possible. I don't remember if someone did the actual voice audio or if it was the NTSB test audio they figured out it could be done on.
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The audio file was created. It appears a BOLO was sent out to scrub it from the web because the pilots unions petitioned the NTSB many years ago to keep these recordings private.
 
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