Ask Led Zeppelinby soupy
They were heavily influenced by British folk music too, for instance their "Black Mountainside" was almost a note for note rip off of Bert Jansch's "Blackwaterside", which is an Irish traditional. They also have elements of bluegrass in their music. And I can think of Zep songs that have both Euro-classical and Eastern harmonies in them.
The rockers of the early 70's were heavily blues influenced, but also used a lot of eastern scales and classical harmony. Especially heavy rockers like Black Sabbath etc. The pentatonic scale, which is most asscociated with the blues, has its roots in early Chinese and Japanese music, which is totally seperate from the blues
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