Someone recently posted this http://www.gatech.edu/newsroom/release.html?nid=61428 linky on a http://www.dslreports.com/forum/r25000639-General-PinDr0p DSLR VoIP Forum . The project is called PinDr0p and it uses Single-Ended Audio Features to Determine Call Provenance through a series of algorithms to detect and analyze call artifacts. From an engineering point of view, the algorithms employed perhaps use some sort of orthogonal transformations which may require a lot of CPU power to transform/analyze segments of audio streams in a time domain to a frequency domain. Nevertheless, I posted this information here to see if it may interest FS developers to incorporate and implement such a scheme into the next releases of FS if the source codes are made available publicly. After all, the project is funded by NSF. ----- don't and stop are the ONLY two 4-letter words considered offensive to men, but not when used together. -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/PinDr0p-A-GaTec-System-to-Trac... Sent from the freeswitch-users mailing list archive at Nabble.com.