Ching-Hua Chuan Elaine Chew Polyphonic Audio Key Finding Using the Spiral Array CEG Algorithm. 21-24 2005 conf/icmcs/2005 ICME http://doi.ieeecomputersociety.org/10.1109/ICME.2005.1521350 db/conf/icmcs/icme2005.html#ChuanC05