Reply to Question on what synth is used in Avicii - Levels??

Hey guys,
So I know Im new here, but thats cause Ive been around futureproducers.com for a while until I realized this community is very active too...

So I want to remix Levels by Avicii and I want to remake his synth used when he shifts octaves.

It's high pitched, has a lot of portamento, but if someone could help me identify what waveforms he uses, reply! If you still don't know what I'm talking about, it's the first layer added after the main breakdown..... High-pitched, moving up and down exactly one octave at intervals of around 1 bar per shift in tone

It's kind of smooth, and really goes well with the piano-sounding main synth.


Thanks for your help guys!!!