On Jan 6, 2010, at 9:08 PM, Kok Chen wrote: > The spectra can be seen at > > http://homepage.mac.com/chen/temp/audio1.png > > http://homepage.mac.com/chen/temp/audio2.png > > http://homepage.mac.com/chen/temp/audio2.png Oops, the last one should be http://homepage.mac.com/chen/temp/audio3.png This is what cut-and-paste does to you :-) :-) 73 Chen, W7AY