OK Computer  was the moment Radiohead moved away from a mostly guitar-based sound. These machines helped them do it. 

It’s hard to believe that Radiohead’s OK Computer is now 20 years old. The album that catapulted the band to worldwide fame was distinctly different from the quiet introspection of their previous release,The Bends, and this was due in part to their move towards a much more expansive sound. At the time when many of their Brit Pop contemporaries were looking to vintage ’60s instrumentation for inspiration, Radiohead took a brave leap into the unknown with their embrace of the experimental electronic gear that allowed OK Computer to truly break the mold.

The band allegedly had a £100,000 budget to buy new equipment before recording, but they still primarily purchased what was considered cheap and accessible (although nowadays their tastes have become a bit more expensive). Some of the pieces that Radiohead acquired to record the album were the Marshall ShredMaster distortion pedal, the Roland RE-201 tape delay and the Mellotron M400 keyboard. To read about all of the gadgets that helped to make one of the ’90s most definitive albums—as well as the songs that they appeared on—click here.

Read more: This 5-minute video explains Radiohead’s ‘Ok Computer’