Is this just a single note with a pitch modulation e.g. with an lfo?
How would the curve look like?
How is the last part different which sounds accelerated?
There are a lot of questions here:
Is this just a single note with a pitch modulation e.g. with an lfo?
Looks like an arpeggiator with different notes.
How would the curve look like?
If you are talking of the modulation (second part of the sound) , I would say a sineshaped LFO that modulate a parameter (which one I don't know, perhaps a wabetable)
How is the last part different which sounds accelerated?
Well looks like the artist wanted to modulate his sound so he did it (but I'm not sure to well understand your question).