Hi, Just tried audio loopback on E65 but unfortunately the high freq noise problem was not reproducible here. Do you think the high freq noise is caused by accumulated echo effect? Perhaps the easiest way to make it sure is by plugging in a headset so there should be no echo, then see if the problem disappears. If it is caused by accumulated echo, audio routing should be the alternative/quick solution, it can be achieved by using APS (http://trac.pjsip.org/repos/wiki/APS), or applying audio routing API (http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-July/003969.html). FYI, echo suppressor is disabled by default on Symbian sample applications. And to enable it, some 'tuning up' steps may be required (e.g: latency info is needed by echo suppressor, while currently it is set to 0). Regards, nanang On Wed, Oct 15, 2008 at 3:40 PM, john <johnswyen at geoinfor.com.tw> wrote: > hi all, > > I'm using the PJSIP stack downloaded from > http://www.pjsip.org/release/1.0/pjproject-1.0.zip and meet some problem > with making a sip call. > When the call has been successfully made(the "m" functionality), some high > frequency noise belong with some echo effect can be heard from each phone's > "loud speaker". Same problem also occurred in the loopback > functionality(press "l"). > > To reproduce the problem, pls follow the steps below: > 1) download http://www.pjsip.org/release/1.0/pjproject-1.0.zip and port into > Carbide 1.3 with "bld.inf". > 2) rename [root]\pjproject-1.0\pjlib\include\pj\config_site_sample.h to > config_site.h > 3) change SIP_DST_URI, SIP_DOMAIN , SIP_USER , and SIP_PASSWD in > ua.cpp(pjproject-1.0\pjsip-apps\src\symbian_ua\) > 4) install "symbian_ua" on target device. i've test on Nokia 6220, > Nokia 6110, Nokia E70. > 5) launch "symbian_ua". Now u should see that u've successfully registered. > 6) press "l" to test the "loopback" functionality. Now u should hear some > high frequency noise belong with some echo effect. > > Thanks in advance, > > BR, > > John > _______________________________________________ > 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 > >
