Haven't used that part, but have a current project using the AK7754 . It also has a graphical design program that includes filters, equalizers, compressors, etc. Code is loaded through I2C. Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com - Advertising opportunities available! Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .