Thin Lizzy have inspired scores of metal musicians over the years, in ways both positive and negative.

This story is not about one of their positive influences.

In a new interview with Metal Hammer, Metallica guitarist Kirk Hammett discusses his notorious abuse of the wah pedal. After first making his effect of choice sound like a colonoscopy (“It actually creates a better connection to the deeper part of me”), Hammett reveals which song first introduced him to the onomatopoeic pedal:

“Hendrix wasn’t actually the first person I heard use a wah-wah pedal – that was Brian Robertson from Thin Lizzy! The first time I became aware of it was the song ‘Warriors’ on [1976’s] ‘Jailbreak.’ “He comes in with this totally wah-ed out two-three notes, and I said to my friend, ‘What is that?!’ He said, ‘That’s a wah-wah pedal.’ ‘Wow, fantastic!’ I made a mental note of that…”

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[via Metal Injection]