about voice

hi all, About voice，I have one question. In the latest git code, when I use bb to call other phone, it will product a file voice.raw. How I can play the voice.raw? which kind of format? 16bit or 8 bit pcm?16khz and 8khz?LSE or MSE? In fact i used the cooledit to play it, both 16khz and 8khz, it has only noise. Other question, I want to input voice from pc that run BB, then the voice can be sent by C123. But I found the voice that be sent by C123 is C123 input voice. Can we realize the idea? Best Regards Shrek W