I’ve been trying to implement the Linphone SDK for Android connected to a TV with an external Logitech webcam (C920) but have been facing terrible echo, whilst using the following parameters:
[sound] el_type=mic #speaker energy threshold (linear scale) above which echo limiter decreases mic gain. el_thres=0.03 #attenuation applied to mic gain (linear scale) el_force=500000 #minimum time in milliseconds during which attenuation is applied el_sustain=600 we tried 250 and 1000 also #double talk detection: threshold of ratio mic-energy/speaker-energy above which mic input is sent anyway. el_transmit_thres=1.7 #noise gate floorgain (gain applied when no voice is detected). ng_floorgain=0.01
I’m confused as to where to look and tinker around to work around the echo issue and was hoping you could provide some clarity. The attached audio file contains reciting from 1-10 and the echo is loud each time.