Sounds like a filtered Square (cutoff about 9 o clock)with some vibrato in it and pushed back with reverb and/or volume. I hope you are talking about the synth which goes from the start..If so, pls try doing this, if you havnt figured it already. Cheers and lemme know, maybe we could both get more PMW.....Interestingly, try the massive pwm wavetable with the same settins (ie some vibrato and some reverb)..Keep in mind, to turn the wavetable to pulse and play with the width..Pretty much the same thing....Both these are layered with a pad, of presumably sine variants...Try it out
Hear it at my signature...the track number 2. Cant post link because am new(soundcloud . com / search_everything/pmwdesign)
The first one uses 2 operator, one for the square and the other for the paddy sine, which too is filtered....
The second one uses massive pwm waveform and operator with the similar pad like sound layeed with it.
you can do a similar thing with pretty much any subtractive synth i guess...
PS: Let me know if u find a btter way, as obviously, this sound might not be what you are looking for.