When he compares the different audios, you see TWO TIMELINES. He's not actually comparing two waveforms here. He is comparing two SCREENSHOTS of waveforms.
That may be so but as long as the scale is the same on both tracks/screenshots, it shouldn't matter whether it was screenshots or actually two tracks. I have used audacity for over a decade, I know how it works.
What time in the video?
Starts at about 24 minutes
He is usuing Audacity to compare waveforms.
But look at the Audacity menu and see how it handles multi track editing.
https://manual.audacityteam.org/man/tutorial_using_multi_track.html
You have one timeline and multiple audio tracks.
This is not what his video shows.
When he compares the different audios, you see TWO TIMELINES. He's not actually comparing two waveforms here. He is comparing two SCREENSHOTS of waveforms.
That may be so but as long as the scale is the same on both tracks/screenshots, it shouldn't matter whether it was screenshots or actually two tracks. I have used audacity for over a decade, I know how it works.
That's the point we can't tell.