“All the albums I did with Metallica were recorded on 24-track analogue tape. There’s not a computer in sight”: How Flemming Rasmussen produced Metallica’s classic Master Of Puppets

Flemming Rasmussen.

PRODUCER WEEK 2025: In early 1986, Metallica’s rhythm guitarist and lead vocalist James Hetfield was in bullish mood, talking about the band’s new album as it was being mixed at Amigo Studios in Los Angeles.

“I know that on this album the fast ones are some of the fastest we’ve ever written,” he told Sounds writer Steffan Chirazi. “We’d never try to forget what Metallica formed for, no way. It’s just that maturity in style breeds better material all round.”