It's probably very simple and I'm guessing it's just an automated Low-Pass filter sweep, but I'm kind of new. In Martin Garrix' new song 'Scared To Be Lonely' he has that synth quickly kind of fading in and out on the chorus, which he does in more than one song. You can hear it at 1:10 - https://m.youtube.com/watch?v=e2vBLd5Egnk
Thanks!
Submitted February 25, 2017 at 01:38PM by DrHWBD https://www.reddit.com/r/edmproduction/comments/5w4w7t/how_does_martin_garrix_do_this/?utm_source=ifttt