"I can turn on some jazz guitarist, and he won't do a thing for me, if he's not playing electrically. But Jeff Beck's great to listen to"

Ritchie Blackmore is expressing his choice for electrical guitarists, such as Jeff Beck, over jazz guitar players. He suggests that jazz guitarists, while talented, do not have the exact same effect on him as electric guitar players. He is highlighting the significance of the electric guitar in his musical experience, and how it can develop a special noise that he delights in. He is also applauding Jeff Beck's ability as a guitarist, noting that he is great to listen to. This quote highlights Blackmore's gratitude for the electric guitar and its ability to create an unique noise that he enjoys. He is also revealing his admiration for Jeff Beck's skill as a guitarist. Ultimately, this quote is a testimony to Blackmore's gratitude for the electrical guitar and its capability to develop an unique sound that he takes pleasure in.