The German web site is:"http://www.zx-team.de". My web page there is :
"http://www.zx-team.de/andre". The French one is: "http://zx81.ordi5.free.fr/andre".
My email to them with your program has been return to me with mention "contaning spam".
Dark clouds are planning over my head. I'll try again, and also through another amail address.
Then You can record the WAV on a tape. Or CDR.
It's a .net app but you should have the runtimes unless you've been living under some kind of update rock for the last 5 years..! If it doesn't work let me know and I'll see about fixing it.
I'm glad You like the idea. I think it's cool for collectors. Or to all guys interested in retro-computing.