Hi all. Please, help again. Fernando Governatore, thank to answer. the problem was really a performance. I'm in the options function pjmedia_resample_port_create was put PJMEDIA_RESAMPLE_USE_LINEAR and PJMEDIA_RESAMPLE_USE_SMALL_FILTER sound is present. But there was another problem. Phrase in the speakers played as if in a compressed form. double speed. but the height of the tone of voice remains the same. but if the file is written to wav and then play, then everything will be fine. anyone experienced this?