Billie Joe Armstrong's guitar tone on Green Day's groundbreaking album Dookie sounded dirty and punchy with the perfect amount of articulation to express the musicality of his fast, melodic riffs. He got that sound by running his signal through two heavily modified amplifiers—one scooped with a ton of gain and the other with a well-defined midrange. When it came time to mix the record, the band blended the two signals together in different ratios to match the vibe of each track.