Who is credited with inventing the technique called scratching grandmaster flash DJ jazzy Jeff?

The technique called scratching is credited to Grandmaster Flash, a pioneering DJ and hip-hop artist. He developed and popularized this technique in the late 1970s, using it to create innovative sounds and enhance the art of DJing. DJ Jazzy Jeff, another influential figure in the hip-hop scene, is also known for his scratching skills but is not the originator of the technique.