Mike Vargas will be playing the Roulette on April 19th. New music by bay area composers Karen Van Duyne, Brien Henderson, and Jeff Thomasson will take place at the Promised Land Church 1661 Market St., San Francisco, April 7th. Jazz and world percussionist Ravi Padmanabha has just released a duo with Daniel Carter. Weathersongs, music algorithmically composed from a weather station, is newly released. Finally, 482 Music is releasing the debut of Greg Burk’s solo piano album.