David Foster acknowledges he and Chris Botti were “kind of stressed” about their first show together, which took place in February 2024 in Florida and also included Foster’s wife and “American Idol” runner-up Katharine McPhee.

“We loved doing it,” Foster, 75, recalls via Zoom, with trumpeter Botti alongside him, “but we were like, ‘How does this mix together, all our different genres of music — Kat with her Broadway, me with my pop, Chris with his contemporary jazz?` And it just worked out great, and the audience seemed to be with us every step of the way.

“And we thought this is something we can work on a bigger scale, so here we are.”

The three have embarked on a 12-city tour that, as Foster indicates, covers a diverse range of material. He’s won 16 Grammy Awards as a performer, producer, arranger and songwriter for the likes of Chicago,  Boz Scaggs, Dionne Warwick, Paul McCartney, Michael Buble, Rod Stewart and many others. Foster also produced Botti’s latest album, “Vol. 1,” and composed music for the Tony Award-nominated Broadway musical “Boop!”

Botti, 62  — a Grammy winner whose myriad credits include Sting, James Taylor, Barbra Streisand, John Mayer and others, in addition to 11 of his own albums — has worked in the studio with Foster since 2001 and says the two are kindred spirits. “I paramountly love melody, and so does (Foster),” Botti explains. “David’s hooked me up with some great people like Josh Groban or Bocelli, of course. And to do that crossover takes a certain sensibility. I consider myself a trumpeter first, not, like, a ‘jazz musician.’”

Foster says he was “determined not to make another record,” but relented in 2023 when Botti asked him to helm “Vol. 1,” asking Foster to “just sit in the chair for six days. That’s all I need you for.” “True to his word,” Foster notes, “It was six days. I didn’t do much — just every once in a while maybe like, ‘Don’t play so much there’ or ‘You should fill that hole.’ Very, very light, breezy stuff.

“So, I don’t know, maybe there’s another six days like that in our life again. We’ll see.”

David Foster and Chris Botti, with Katharine McPhee, perform up 8 p.m. Saturday, June 21 at the Detroit Opera House, 1526 Broadway St., Detroit. 313-237-7464 or detroitopera.org.