I long to create this synth lead sound made by Procuder "Vanic" but I don't quite get there. (First link) What I did so far (and turned out to be relatively similar) was creating a square wave, put unison to 2-3 and play around with detune a little and adding a little EQ and reverb. If there's a better way let me know! But the most important aspect I can't figure out how to create is this "whiny" and even a bit "whale-ish" kind of sound (which is audible in both songs' lead melody) if you know what I mean :D And If you have any idea on the second-link-lead-sound feel free to tell me :D Thank you!!
First link:
(0:56)Second link:
(1:25)