So I was recently revisiting all of the Porter Robinson's old stuffs such as 'Say My Name', 'Hello', 'I'm on fire', 'Less Go' Remix and other stuff. Also some of the Madeon's live exclusive tracks like 'Ubelkeit' and 'Monarch'. And I found that all of these tracks that I mentioned use a really fat sounding saw bass with the sine/triangle sub bass. I tried to remake those sounds but it's not even close. Any tips? 

Thanks.