The band 's members are Thile ( mandolin ) , Gabe Witcher ( fiddle ) , Chris Eldridge ( guitar ) , Greg Garrison ( bass ) , and Noam Pikelny ( banjo ) . The band consisted of Chris Thile ( mandolin ) , Gabe Witcher ( fiddle\/violin ) , Chris Eldridge ( guitar ) , Greg Garrison ( bass ) , and Noam Pikelny ( banjo ) .