Newsbits: Conch Shell Trumpet / Mariel Roberts / Joëlle Léandre and Maggie Nicols / Nate Wooley and Ivo Perelman

You can listen to an 18,000-year-old conch shell trumpet.

Mariel Roberts’ Armament album is reviewed.

You can hear about 10 minutes from a 2015 performance from Joëlle Léandre and Maggie Nicols.

The latest from Nate Wooley and Ivo Perelman is reviewed.