RCA, 3.5mm, 6.5mm, etc are all analogue and all required in terms of DJ'ing and Live Performance. I'd rather not make my own cables when I'm playing on anywhere upwards of 20,000watts of stereo (this is usually the smallest system I get my hands on). It's time to think of this professionally, I am only going to go further. In terms of doing this myself for my studio, I'd rather not gamble my hard earned cash on dodgily self-made cables either. I hear the difference between shitty cables. I have two cheap cables side by side and can tell the difference between these two. I want the best quality, this is not a debate. That being said, I'm not interested in wank factor "I spent $X on this brand of cables because " I'm interested in the science behind it and why someone would recommend those cables. Durability/Rigidity is also a factor of concern. These cables are gonna cop a lot of abuse travelling, being plugged in and out of shit all the time. Something else to consider.