Would like to have community's help on identifying the dominant instrument (obviously apart from purcussion, guitar) playing in this clip. It does seem to be synthesized sound, and heavily modulated. What kind of equipment might be used to product such sound ?
PS> The clip is extracted from a youtube video of this Indian movie soundtrack (Note that I've placed a time-marker that starts to coincide with the clip in question). The information section has all the other details (“Khamoshiyan” featuring Gurmeet Choudhary, Sapna Pabbi and Ali Fazal which is sung by Arijit Singh & composed by Jeet Gannguli).