Willie Nelson, Norah Jones, Joe Jackson, Paul Weller, Sinead O’Connor, John Mayer and other music stars will appear . . .

. . . for public radio’s corps of Triple A music programmers May 17-19 at the 12th annual NON-COMMvention at WXPN and World Café Live in Philadelphia. Music “blogger/instigator” Bob Lefsetz, as WXPN’s organizers describe him, will be interviewed the first day. Conference details are online. . . .