On a quiet Tuesday afternoon in March 1979, a fascinating psychological and musical showdown took place inside a low-ceilinged, carpeted rehearsal space in Hollywood. The air in the room carried the distinct scent of cable insulation, stale coffee, and the lingering warmth of a rock band resting between grueling tour cycles. Sitting on opposite sides of a simple folding table were two young men with completely opposing views on the future of rock music. One was a 23-year-old phenom who was rapidly altering the global musical landscape. The other was a respected, deeply knowledgeable music journalist who was thoroughly convinced that the young phenom was leaning on a cheap theatrical trick.
The young star was, of course, Eddie Van Halen. The journalist was Paul Mercer, a prominent writer for Guitar World magazine.
By March 1979, Van Halen’s self-titled debut album had been electrifying the airwaves for thirteen months. It had already shattered expectations, selling over two million copies and introducing the world to “Eruption”—a blistering, volcanic instrumental track that caused countless guitarists worldwide to look at their own instruments with a mix of awe and deep existential dread. Eddie had instantly become the most fiercely debated musician in rock culture. Yet, the core of the debate wasn’t about his dexterity or whether he could command an audience; it was about what his technical innovations actually meant for the evolution of music.
To the old guard and technical purists, Eddie’s signature two-handed tapping technique was viewed with intense skepticism. Many believed it was a spectacular novelty—a flash-in-the-pan gimmick that would inevitably age poorly, leaving behind only a brief memory of a hyperactive trend before rock music inevitably returned to its traditional, picked roots.
Paul Mercer was a firm believer in the “gimmick” camp. He wasn’t speaking from a place of ignorance or jealousy; Mercer had spent twelve years studying the guitar and six years writing professionally about the absolute best players in the business. He had listened to Van Halen’s debut album with strict, analytical focus. His formal technical objection, which he had already published in print twice before, was that two-handed tapping was merely a speed technique rather than a true musical innovation. Mercer argued that tapping produced an inherently percussive, flat note that lacked the rich dynamic range and tonal variation of traditional picking. In his eyes, it was a physical stunt—unnecessary in standard play and limited to high-speed bursts.
Armed with his tape recorder, notepad, and unwavering confidence, Mercer arrived at the rehearsal studio ready to challenge the young rock icon. He expected a standard, defensive public relations debate. He never could have anticipated that Eddie’s counterargument would require no words at all.
Eddie greeted the journalist with an easy, unassuming warmth, completely devoid of rock-star pretension. He wore simple jeans and a T-shirt, holding an unplugged electric guitar across his lap like an extension of his own body. As the interview began, Mercer laid out his technical critique clearly and respectfully, framing the purist argument that tapping was a musical dead end.
Eddie listened patiently, without a hint of anger or defensiveness. “It depends on what you’re trying to do,” Eddie replied calmly. “But doesn’t that apply to any technique? It expands what’s possible on the instrument.”
Mercer, believing he had the logical upper hand, pushed further. “Can you demonstrate that? Not ‘Eruption.’ I’ve heard ‘Eruption.’ Show me something that proves this technique does something conventional playing cannot do. Something genuinely musical, not just fast.”
Eddie looked at the writer for a brief moment. “You play guitar?” he asked. Mercer nodded, noting his twelve years of experience.
In a sudden move that caught the journalist completely off guard, Eddie held out the instrument. “I want to show you something,” Eddie said with a slight smile. “It’s easier if you feel it than if I explain it.”
Mercer took the guitar. His hands moved with the natural familiarity of a seasoned player.
“Play a scale,” Eddie instructed. “Any scale. Just go up and down the neck in whatever position you’re comfortable with.”
Mercer cleanly and competently executed a standard C major scale in the second position. It was a flawless demonstration of textbook accuracy.
“Good,” Eddie said. “Now, without moving your left hand from that exact position, play the same scale one octave higher.”
Mercer stared down at the wooden fretboard, his mind working through the geometry of the instrument. To play the exact same scale an octave higher from his current hand position was physically impossible. The frets were too far up the neck. To reach those higher notes, a player had no choice but to shift their entire left hand up the fretboard, abandoning the original position entirely.
“I’d have to move my hand,” Mercer stated flatly.
“Right,” Eddie smiled. “With tapping, you don’t.”
Eddie took the guitar back into his lap. He placed his left hand into the exact same second-position C major shape that Mercer had just used. Then, his right hand floated over the neck. Over the course of the next thirty seconds, Eddie did not unleash a torrent of lightning-fast notes. Instead, he did something far more profound: he played both octaves of the scale simultaneously.
His left hand held down the lower register while his right hand tapped out the higher register. The two distinct voices moved together in perfect parallel harmony. The melody filled the room with an undeniable harmonic clarity that had absolutely nothing to do with speed, and everything to do with polyphonic composition. He played it slowly, deliberately, giving every single note its full, resonant value. It was the tempo of a patient teacher delivering a profound proof to a student.
