Ciao Massimo, yes, I am Italian, and I suggest you to subscribe to the Italian discussion group about SDR. It is here : http://it.groups.yahoo.com/group/SDR_ITALIA/
The descrambling of crypted voice transmissions is quite difficult, as there are many ways to crypt such kind of information. After all, the whole purpose of crypting is to make impossible, or at least as much difficult as possible, to recover the information by those who are unauthorized. In the beginning they used a simple method of spectrum reversal, where the low voice frequencies were put at the high end of the spectrum and viceversa. In practice, the spectrum was mirrored around its central point, making thus impossible for a casual listener to understand what was said. But this simple method was easily defeated and more robust encryption techniques started to be used. My knowledge on the subject stops here. I am not an expert in this field and have no particular interest to become. Maybe if you ask on the group mentioned above, somebody could give you some information. About WAV recording in SDRadio, yes, I agree it would be an useful feature and probably it will be eventually implemented. 73 Alberto I2PHD ------------------------------- macks0 wrote: > Hi Alberto hi all my name is Massimo,i hope to make sense of well in > English even if I preferred in Italian because from the name I believe > you are Italian but here i see all in english. I possess a vr500 and > listening all the frequencies but I often like to turn for the HF and > it happens me to listen to frequencies with voice criptata and the > thing it fascinates me not few, for instance listening in 3.4110, > 3.4210, 3.8310, 4.7410 and more, I have tried to use your SDRadio and > I also try with Voice Descrambler of Nino Porcino (that besides I > don't succeed in contacting), and I don't succeed in decoding these > dialogues but I have as the impression that you miss a nothing, > little, in to succeed in doing him/it so much that some word at times > seems to me him to succeed in understanding, I have tried to filter > and rifiltrare more times with SDRadio but nothing. If you accept a > suggestion in your SDRadio it would miss a beautiful recorder. > Considering that you are very more experts in the radio I listen and > really strong in to create these softwares, I would like to ask to you > a suggestion on as decriptare these dialogues or if you address to me > to use some softwares more proper. You regard and aspect one answer of > yours CIAO all
