To mark the digital release of “Feistodon,” a split single that has Feist and metal act Mastodon covering each other, the bands have released a new video that lets listeners cross-fade between each version of the song “A Commotion.”

Members of the feminist band Pussy Riot went on trial Monday for holding an anti-Putin “punk prayer service” in Moscow’s Christ the Saviour Cathedral in February. If found guilty of “hooliganism motivated by religious hatred,” they face seven years.

“The arts are not something separate from us,” says Grammy-nominated pianist-composer Vijay Iyer. “[W]e are the arts. And I say that with the utmost humility, because when I say ‘we’ I don’t mean ‘we artists,’ I mean we, as humanity.”

In honor of its 25th anniversary, Bikini Kill is reissuing past albums and unreleased demos via their own label, Bikini Kill Records. They’ll also be sharing zines, practice tapes, flyers, and other ephemera from their touring and recording history.

Fresh off last month’s Rock the Garden gig, Merrill Garbus, aka tUnE-yArDs, is in the UK for a Wednesday night performance in A Room for London, a Fiona Banner–designed one-room “boat” facing the Thames. The concert will be webcast live.

To celebrate composer Philip Glass’ 75th birthday, NPR Music partnered with Glass to turn parts of his 1997 3-D digital opera Monsters of Grace into a work for vocalists: 200 showed up to sing the work in a “flash choir” in Times Square.

New York’s Symphony Space will host a series of talks inspired by John Cage. Based on Cage’s own 1989 “multi-layered, thought performance,” each “How to Get Started” event will pair an artist and musician in conversation.

Your Monday morning melody comes to us from mashup artists Daft Beatles. Together at last (and meshing rather well): Blondie’s 1979 single “Heart of Glass” and Philip Glass’ “Violin Concerto II.”