Good that you checked it out before saving it. I wonder what it would look like on a scope.
Yes.
On the oscilloscope, the sine wave is weird, irregular.
Spectrum analyzer shows it being all roughly in the 60 hz and 170 hz area.
On a voiceprint, it has a speckled salmon appearance, but only when you drop the voiceprint from 500 bands down to 40.
I'm thinking on swapping the voiceprint colors to contrasting colors to see what that does, see if there is anything odd to see.
There is a weird line in the voiceprint, but that could be an artifact of mp3 compression.
I have seen such in my music.
Just redid the osciloscope eyeballing using a bigger screen resolution.
The irregular wave form described earlier was an artifact of the scope size.
The scope does this neat illusion of five wave forms superimposed on each other.
(Refresh rate of scope 80 frames per second)
All low frequency, and rather uniform.