The baton is a slender thing, weighing no more than a few grams. In the hand of Juanjo Mena, it has always functioned as a lightning rod. For decades, when he stood atop the podium—whether at the Cincinnati May Festival or with the BBC Philharmonic—that sliver of wood didn’t just mark time. It carved shapes out of the air. It pulled a hundred disparate souls into a singular, breathing organism.
Music is a game of memory. A conductor doesn’t just read a score; they inhabit a massive, multi-dimensional map of sound. They must remember that the second oboe has a sharp entry in bar 42 while simultaneously anticipating the swell of the cellos three pages later. It is an Olympic feat of cognitive endurance.
But now, the map is fading.
The announcement that Juanjo Mena is retiring due to Alzheimer’s disease is not merely a "personnel change" in the world of classical music. It is a quiet tragedy about the nature of identity. When a master of memory begins to lose the very faculty that defines his craft, the music doesn't just stop. It changes key.
The Architecture of a Disappearing World
To understand what Mena is facing, we have to look past the clinical definitions. Medical journals will tell you that Alzheimer’s is a neurodegenerative condition characterized by amyloid plaques and neurofibrillary tangles. They will speak of the hippocampus shrinking.
That is the "what." The "how" is much more intimate.
Imagine a grand library where the lights are being turned off, one by one, in the furthest corners. At first, you don't notice. You’re reading in the center of the room, and the glow is sufficient. But then, you go to reach for a specific volume—perhaps a Mahler symphony or a memory of a summer evening in Ohio—and you find that the shelf is shrouded in shadow. You know the book is there. You can almost feel the leather binding. But your hand passes through empty air.
For a conductor of Mena’s caliber, the stakes are uniquely cruel. His life’s work has been the pursuit of "The Pulse." In music, tempo rubato allows a performer to "steal" time—slowing down here, speeding up there—to create emotion. There is a profound irony in a man who spent his life masterfully stealing time now finding that time is finally stealing him back.
The Cincinnati May Festival, where Mena served as Principal Conductor from 2017 to 2023, is a place of massive scale. We are talking about choruses of 200 voices and orchestras that fill the rafters of Music Hall. Leading that kind of force requires a terrifying amount of mental "bandwidth." You aren't just managing notes; you are managing the collective heartbeat of two hundred humans.
When that bandwidth begins to fray, the transition isn't an explosion. It’s a smudge.
The Invisible Threshold
There is a moment in the progression of cognitive decline that remains largely invisible to the public. It is the "professional mask" phase. Musicians, especially those at the elite level, have spent their entire lives building muscle memory. A violinist can play a Bach partita while thinking about their grocery list because the pathways in the brain are burned deep, like canyons.
Mena likely navigated this threshold with the grace of a matador. He is a man known for his warmth, his Basque fire, and his technical precision. For a while, the muscle memory holds. The instinct for the upbeat, the reflex to cue the horns—these things live in the "old" brain, the part that stays lit long after the "new" brain begins to dim.
But the "new" brain is where the nuance lives. It’s where the conductor decides, in a split second, that the acoustics of the room today are too bright and the violas need to be more "chocolatey." It’s where the complex social engineering of rehearsals happens.
Consider the hypothetical scenario of a rehearsal under these conditions. The conductor stops the orchestra. He wants to correct a phrasing in the woodwinds. For a fleeting second, the word for "flute" isn't there. Or the bar number he just read has vanished. He pivots. He uses a gesture instead of a word. He hums the line. The orchestra follows, because they love him and because his musicality is still radiant.
But the conductor knows.
He feels the slip. He senses the gap between the intention and the execution. It is a profound act of bravery to admit when the baton has become too heavy to carry—not because of its physical weight, but because of the cognitive load it represents.
The Legacy of the Echo
The news of Mena's retirement has sent a ripple of somber reflection through the international arts community. This isn't just about a job opening. It’s about the vulnerability of the human instrument.
We often treat our maestros like gods—ageless figures who remain on the podium well into their nineties, like Toscanini or Stokowski. We want them to be immortal because the music they conjure feels eternal. When a figure like Mena steps down at 59, it shatters the illusion. It reminds us that the art is housed in a fragile vessel of neurons and blood.
The Cincinnati years were transformative. Under his leadership, the May Festival didn't just perform the "greatest hits." He pushed for Spanish repertoire, for the works of Ginastera and Granados, bringing a specific, rhythmic vitality to the American Midwest. He forced the air to move differently.
He could have stayed longer. He could have "faked it" for a few more seasons, relying on the immense goodwill of his players and the safety of familiar scores. Many do. But there is a specific kind of integrity in choosing silence over a blurred performance.
When the Music Stops Being Sound
There is a strange phenomenon in music therapy where patients with advanced Alzheimer’s, who can no longer remember their children's names, can suddenly sit at a piano and play a Chopin Nocturne without a single mistake.
The music is the last thing to go.
It is stored in a part of the soul that seems immune to the physical decay of the brain. While Mena may be stepping away from the professional stage, he isn't stepping away from music. He can't. It is written into his DNA.
The tragedy of this retirement is ours, the audience. We lose the interpretation. We lose the specific way he would shape a crescendo in a Bruckner symphony. For him, the journey is different. It is a retreat into the internal rhythm.
We live in a culture that prizes "robustness" and "unyielding" strength. We view retirement as a defeat and illness as a failure of the will. But look closer at Mena's decision. It is an act of stewardship. He is protecting the music from his own decline. He is ensuring that the last memory his players have of him is one of clarity and passion, rather than a slow, public dissolving.
There is a specific term in music: Morendo. It means "dying away." It is an instruction to the performer to let the sound fade until it is barely a whisper, eventually becoming indistinguishable from the silence. It is one of the most beautiful markings in a score. It doesn't mean the music has failed; it means the music has reached its natural conclusion.
The lights in the library may be dimming for Juanjo Mena. The shelves may be thinning. But the architecture of the building—the grand, sweeping halls he built in Cincinnati, Manchester, and Madrid—remains.
The baton is down. The hall is quiet. But if you listen closely to the archives, or stand in the back of Cincinnati’s Music Hall when the sun hits the stained glass just right, you can still hear the shimmer of his strings. You can feel the ghost of a pulse that refused to be rushed.
In the end, we are all just a collection of notes held together by the grace of memory. Some of us just happen to hear the symphony more clearly than others.
