Once again, Czechia’s second city, Brno, celebrates native son Leoš Janáček, the most unpredictable and least conventional of the nation’s four foremost compositional voices. But as happens the fourth year of each decade, institutions everywhere are observing a Year of Czech Music. Hence, Brno is casting a wider net that usual. Symphonic, chamber, and recital programs resound in concert halls and villas all over town, honoring well over a dozen of Janáček’s compatriots, foremost among them his fellow titans Bedřich Smetana, Antonín Dvořák, and Josef Suk. Operas include local and imported productions of Janáček’s Jenůfa, The Cunning Little Vixen, The Makropulos Affair, and The Excursions of Mr. Brouček, whose space-traveling hero was the inspiration for the festival’s tagline, “No limits!” Janáček’s favorite student Pavel Haas, who died at Auschwitz, rates a blue-moon revival of The Charlatan, his only opera. Watch, too, for Dvořák’s increasingly indispensable Rusalka, plus smaller-scale theatrical premieres. —Matthew Gurewitsch