Illustrated articles about building and tuning a xylophone are at http://www.mmdigest.com/Gallery/Tech/index.html "Percussion": http://www.mmdigest.com/Gallery/Tech/breen_xylo.html Calculations for Xylophone Bars by Jack Breen (980321 MMDigest) http://www.mmdigest.com/Gallery/Tech/XyloBars.html The Construction and Tuning of Vibrating Bars by W.E. Flynt, Dallas, Texas First published in "AMICA Bulletin" of December 1972 and March 1973 Revised January 2009 for Mechanical Music Digest