But on Frenchmen Street in the Marigny neighborhood, the music hadn’t started yet. The tuba player Matt Perrine was getting ready to offer his own tribute to Mr. Domino with Alex McMurray and the Tin Men at d.b.a., a live music venue.

“It’s odd to say this, but I feel like I did when Prince died,” Mr. Perrine said. “When somebody who I respect that much dies I try to figure out how big a hole is left,” he said. “This one looks like a chasm. I can’t even imagine what it’s going to be like to recover from his loss.”

“I had to break the news to my dad,” said Don B. Bartholomew, a son of Mr. Domino’s frequent collaborator, the bandleader Dave Bartholomew. “He took it terribly hard. I called him about one o’clock today. I knew he would be getting calls and I didn’t want him to hear it from the public. But it was so difficult to tell him.”

Mr. Bartholomew now runs the studio in the city’s Seventh Ward where his father and Mr. Domino used to write and rehearse. On Wednesday afternoon he was working out arrangements for his family to participate in memorial events. Down the block some of his neighbors were out on the porch, playing Mr. Domino songs and drinking beer.

Inside the studio’s office, where the sleeves of Mr. Domino’s rock ’n’ roll records from the 1950s were on display, Mr. Bartholomew remembered the man he thought of like an uncle.