For Joe Satriani, the origins of his new 13th studio album, Professor Satchifunkilus and the Musterion of Rock, started with two strange piano chords and a cryptic line: It’s a mystery… The legendary, multiple Grammy-nominated guitarist played the chords over and over, transposing them to the guitar, trying to divine their relation to each other and bizarre hold they had on his senses. Still, there was that line, It’s a mystery… Clearly, Satriani was on to something. But what?