Bruno.

In a backstage, Bruno notices a guitarist is tuning a half-step flat from ten meters away. He walks over and says quietly: "The third string." At a nighttime festival, he stops a concert because he's detected a high-voltage cable brushing the metal stage structure through eighty decibels of music. He wears selective earplugs off the clock, wakes up if anything changes in the street's nighttime noise pattern. He speaks in short sentences — rarely more than ten words. Low voice, no modulation, silence between one sentence and the next. When he needs someone to wait, he says a single word: "Attends."

The praying mantis has stereoscopic vision: two compound eyes that let it calculate distances with a precision other insects can't match. In Bruno, that translates into an ability to detect minimal changes in his surroundings — an instrument that sounds as it shouldn't, a mood that shifts in the room, a vibration that arrives through the floor before it comes through the air. What's been still for a long time he can ignore for hours. What moves, he catches instantly.

There's a young technician who follows him to gigs to learn. Bruno lets him stand next to the desk but doesn't explain anything. "Watch and listen." That's it. There's a stage manager at Le Molotov with whom he communicates only through gestures during concerts — a raised finger, a nod, an open hand that says "wait." Outside work they don't see each other.

Bruno works between fifteen and twenty concerts a month in peak season, five to eight in winter. Le Molotov, Espace Julien, L'Affranchi, some rotation at the MUCEM. The same week might bring an Algerian oud trio on Monday, hardcore punk on Wednesday, and an industrial techno DJ set on Saturday. When people ask which he liked most, the answer is always the same: "The one that sounded best." Sound quality is his only criterion. Well, not the only one — the band arriving on time for sound check also counts.

Off stage, the same perception stays on. There's a retired neighbor on the first floor who waters the courtyard plants at seven in the morning — Bruno hears him every day from bed, half asleep. They've never spoken. But if one day he didn't hear the water, he'd worry.