not sure how to actually accomplish this in Ableton or any other DAW because Im not sure what he means by "link the bass to the high" but the idea is that the low frequencies act as a modulation on the highs. This could mean a volume or distortion or compression automation but I can't be sure because "link the bass to the high" is extremely vague. My best guess would be to buss the low end of your whole mix and the highs to one channel, then distort that channel, then filter out all the lows and mix that channel back into your mix. Not exactly sure if thats what he means but worth a shot!