The 12-note keyboard was “originally conceived as a tool for Parker’s own songwriting” more than a decade ago.

Sonic Youth’s Lee Ranaldo, Kim Gordon, Thurston Moore, and Steve Shelley, August 1991 (Gie Knaeps/Getty Images) ...

Trending on Billboard In the dream, Hagar said Van Halen showed him “this harmonic thing… he slid up to a chord, like a slide guitar. We wrote a song with that lick.” The next morning ...