Also, this isn't the real "original" version of the song ._.
Anyways,
the claims about the suicides is just there to give the story a creepy aspect.
Yes, the song had sounds that caused some discomfort.
But nobody ever committed suicide from it. It's just fuel for creepy pastas.
What spawned them was the reports that a few kids were admitted into the hospital with cases of nausea, disorientation, and severe headaches caused from ruptured ear-drums.
Note that the actual numbers were low double-digits.