> >I don't know anything about Matlab, but I think you misunderstand the data > >format. Most WAV files and the way I implemented the sound in the PIC just > >store the waveform sampled at a regular interval. You can think of each > >number as an instantaneous voltage snapshot. It is not a frequency and > >duration. > > Thanks a lot for your reply. But may l know do you have any sample programme > with you? Is it possible that you send one sample programme to me through > e-mail, so that l can study it as an example? And do you have the external > circuitry design that will enable it to produce sound? Please stop sending me private email unless it is a truly private matter - which this isn't. I'm getting tired of swithing the reply back to the list address manually. I did try to send the source code for the WAV to PIC conversion program and the Win32 EXE, but the list server refused it because it was more than 1000 lines. It must have been counting attachment lines. ***************************************************************** Olin Lathrop, embedded systems consultant in Devens Massachusetts (978) 772-3129, olin@cognivis.com, http://www.cognivis.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu