Wednesday, Sept. 28, violinist Aaron Pettengill will perform at the Oasis of Music, Trinity Church, 247 Bates St., Lewiston, from 12:30 to 1 p.m. For this performance Pettengill will play several movements from the solo violin literature of J.S. Bach.  Also on the program will be selections from the violin-viola duets of Mozart, where he will be joined by Greg Boardman on viola. The Oasis of Music concerts are open to the public and always free.  For more information call 344-3106.