Phoncert will offer audio streams of all of the Main Stage sets from this weekends WinterWonderGrass Festival in Avon, CO, starting with this evening’s Greensky Bluegrass and Leftover Salmon performances.

The free iOS app/online streaming service will continue their boradcast tomorrow with sets from Greensky Buegrass with Sam Bush, Nicki Bluhm & The Gramblers and more. The Infamous Stringdusters, Elephant Revival and Head for the Hills are among the acts that will be streamed on Sunday.