Your kid has some great taste! Doom is one of my absolute favorite hip-hop artist. It’s really cool of you to do this for him. I wish I had a sampler as capable as the Digitakt when I was a teenager.
Doom used a 404 and MPC for a bunch of his earlier stuff., as did Madlib (303, MPC). However, that was before the Digitakt was around. I think the Digitakt is a great gift to get him for making Doomesque beats. He can just run a y audio cable from his phone, granted it has the audio out attachment on the phone, to the Digitakt. I’m almost certain if Doom, and Madlib could have expedited the gathering of samples process they would have, but they worked with what was available to them. Now Madlib just uses an IPad for his productions, as he says it’s not as restricting as the stuff he once used. . His latest album with Freddie Gibbs was mostly done on an IPad, so I don’t recommend the 404 (as you said cryptic, and a PIA). The Digitakt was so quick, even without reading the manual. It just makes sense how it’s programmed and laid out.