The American River College Theater was sold out Friday evening as the Sacramento Master Singers presented a wonderful ensemble concert to begin their 26th season. “From Sand to Pearls: A Choral Tribute to Perla Warren” honored the longtime music instructor with an ambitious program involving four choral groups, several supporting instrumentalists and a solo jazz pianist. Many of the musicians were former students of Warren and credited her with the transformation of young voices into accomplished musicians. Dr. Ralph Hughes, artistic director of the Master Singers and a colleague of Warren, is also the director of the 26-voice American River College Chamber Orchestra. He led his youn