Stevie Lennox chats with Spud Murphy about his crucial role in sculpting the soundworlds of Lankum, Black MIDI, ØXN and more Photos by Loreana Rushe In an inauspicious arch underneath the Dart line in North Dublin you’ll find John ‘Spud’ Murphy, working away in his longtime hub of Guerrilla Studios. “So it still is like a cave, which has pros and cons,” he says. “You’re in a cave. And there’s no external light, but you don’t know what time of the day it is. So you just keep working and you’re not looking outside going, oh, it’s beautiful outside. You…