I don't have a video tutorial or anything, but I'm going to explain how to make a bass sort of like his. It isn't EXACTLY it, and you'll have to do extra processing and add distortion and such, but this is so you guys can have a starting point.
And for all of the oscillators, I'd recommend putting the stereo to around or at mono position.
AND of course start with the init patch. (if you pirated your sylenth, you may have a different init setup, so I'll try to explain how I have mine setup)
PART A -
Osc A1 - saw wave with 8 voices
Osc A2 - sine wave with 8 voices (definitely put this in mono)
Amp Envelope A -
Attack - 0
Decay - 0
Sustain - 10
Release - 0
Filter A -
Input select - AB
Filter - Lowpass at 24 db
Cutoff all the way to the right, and resonance and drive all the way to the left.
Filter Control A -
Cutoff all the way to the right, resonance all the way to the left. put keytrack to 1.62 and leave the warm drive off.
PART B -
Osc B1 - Another saw wave with 8 voices, except this time the phase is shifted to exactly 291.43 degrees. (try to get the phase exactly right, because it makes a huge difference in the sound)
Osc B2 - Hpulse wave with 8 voices, phase shifted to exactly 171.43 degrees.
Amp Envelope B -
Same as the one for A
Filter B -
Input select - AB
Filter - lowpass at 24 db
Cutoff at 7.35 hz, resonance at 0.62 and drive at 0.90.
Filter Control B -
Exact same as A.
Master volume control -
Mix A and B are both at 5, and the main volume should be at 2.41. (it's kinda loud, lol)
Leave everything else untouched, you won't be needing the mod envelopes or LFOs or misc envelopes (unless you want of course) and you can add some portamento and legato slide if you want.
The only effect inside of sylenth that I used was the bitcrusher, and I put the amount to 5.41 and the dry/wet to 100%.
If you didn't find this tutorial helpful at all or if you aren't happy with the sound, please don't bitch me out, I'm really just trying to help people.