Hi Steven, First what operating system do you have on your development board? To minimize porting issues I would recommend linux. Then download and compile pjsua You can run pjusa with arguments: --null-audio --auto-play --play-file <file-to-play.wav> --add-codec pcmu Look at http://www.pjsip.org/pjsua.htm for details. On the phone I suppose you can use any VoIP for SIP and decompression. BR/Olle -----Original Message----- From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of sjs205.linux at googlemail.com Sent: den 13 september 2011 17:38 To: pjsip at lists.pjsip.org Subject: Send compressed audio file. Hello all, I am trying to test the various PJSIP compression algorithms and SIP protocol using a development board that does not feature a sound input. With this in mind I simply wish to test the the compression using a simple .wav or .pcm file. Once the application is running I will then check on a receiving phone that the clip is being compressed and decompressed correctly, by ear, whilst checking the CPU load on the development board. Can anybody point me in the right direction? That is, how do I send the sound clip to SIP? Would i need some application to read the file contents before piping this to PJ or can it handle this too? Any help would be greatly appreciated. Best regards, Steven _______________________________________________ Visit our blog: http://blog.pjsip.org pjsip mailing list pjsip at lists.pjsip.org http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org