We have a strange audio distortion using fileinput or the portaudio interface in pjsip under linux with the current version and different linux distribiutions but not in Win32. I would describe the distortion as humming bass. I followed the suggestions in the audio troubleshooter section in pjsip wiki (http://trac.pjsip.org/repos/wiki/sound-problems) but nothing helped. The distortion depends on the input audio signal level and frequency and is caused by the encoding side. The following audio samples shall demonstrate this: The original source 44.1 KHz 16 bit mono: www.bercos.de/public/testsounds/test_audio_441_16_cut-mono.wav Local loop with pjsua in Win32 with G.722 www.bercos.de/public/testsounds/rec_local-PC-16-44100-G722.wav Audio encoded on Linux and played in Win32 with G.722 (with distortion) www.bercos.de/public/testsounds/rec_Linux-PC-16-44100-G722.wav Same as before but encoded with L16/44100 (no difference, with distortion) www.bercos.de/public/testsounds/rec_Linux-PC-16-44100-L16_441000.wav Same as before but input over Alsa-Jack->PortAudio->pjsua on Linux (with distortion) www.bercos.de/public/testsounds/rec_Linux-PC-linein_Jack-PortAudio-G722.wav Now back to Alsa input in pjsua on Linux (please ignore drop-outs, sound is clear) www.bercos.de/public/testsounds/rec_Linux-PC-Micro-44100-G722.wav Used command line options (have no influence on the problem): --ec-tail=0 --no-vad --quality=6 user.mak settings export CFLAGS += -DPA_USE_JACK=1 -DPA_USE_ALSA=1 -DPA_USE_OSS=1 export LDFLAGS += -ljack export PORTAUDIO_OBJS += pa_jack.o pa_ringbuffer.o config_site.h settings #define PJMEDIA_HAS_GSM_CODEC 0 #define PJMEDIA_HAS_L16_CODEC 1 #define PJMEDIA_HAS_ILBC_CODEC 0 #define PJMEDIA_HAS_SPEEX_CODEC 1 #define PJMEDIA_HAS_G722_CODEC 1 #define PJMEDIA_HAS_SRTP 1 Does anybody have an idea what the reason might be? Another problem: If define PJMEDIA_HAS_SRTP is enabled (default), pjsua crashes in function pjmedia_transport_srtp_create() line 279 of endpoint.c (Nullpointer: endpt is NULL) return pj_pool_create(endpt->pf, name, initial, increment, NULL); (only in Win32 Release Version) best wishes, Thomas Kluge
