Here's my approach,
1st: Get some beans of Kenian Pearl, Maragogype (just the same amount) and a little bit of Ethiopian Mokka (about half as much). All should be roasted freshly and slowly, also make sure that they have been fermented. Take care of taste-phase-problems!
2nd: Grind them (it's metal) using a cooler (mustn't get warm). Make sure you use an even running converter (perhaps you'll have to use a masterclock).
3rd: Add some fresh cacao (pure) or cardamom. Remember: good usage of FX won't pop out.
4th: Keep it analogue! Put them into a manual coffeemaker (I'd suggest
Bodum) and pour over water at 85° centigrade - more will add kick ("transients"), less will smooth it ("warm sustain"). 0,2 ml per spoon should be average - you may alter the proportions to adjust transparency and "wall of taste".
5th: Let rest for five minutes and 36 seconds but stir up (slow and carefully) every 58 seconds. You may wait longer but don't let the saturation lead to sensible distortion. Push down the sieve (you may use a popfilter instead).
6th: Don't add milk (if it needs to be done at all - concede this job to a professional mastering-engineer).
...maybe I'm a bit of a highend fan.