Hi all, I'm working on making an AMR encoder. It is based on the source code of AMR speech codec (3GPP TS 26.073). The source wave data is encoded by this codec and then is packed into AMR storage format (draft-ietf-avt-rtp-amr-13.txt section 5). Unfortunately, the generated amr file is only the noise when playing in 7650. Can anyone give me some advice? Thanks for your attention.