lol, the thread you quoted was my old thread
I looked at your past questions and it appeared that enough info was given to get you started.

I just cannot seem to get the "whistling sound" i want, i need it to sound like a bird. You think it's not possible to do?
Ross made a cricket sound, so I would think a bird could be done. http://www.picbasic.co.uk/forum/show...hlight=cricket

Now , why is you application not working? Who knows?
Have you been trying to use the FREQOUT routine with PBP? Let us know what you have tried with PBP and I am sure someone can help. i have head sirens made with PBP too. Look at the FREQOUT command. Dual or single frequencies millisecond time blocks. Nest several in a FOR/NEXT loop.

first, i have only tried with proteus and the "Sounder" component
I do not know proteus, but when I google it stuff like this come up http://www.bact.wisc.edu/Microtextbo...tid=254&page=1