Hello When I enable echo cancellation, my app crashes on iphone Thu Mar 12 21:27:09 Assertion failed: (N>0), function echo_supp_cancel_echo, file ../src/pjmedia/echo_suppress.c, line 678. Here is the lines of code : N = ec->samples_per_frame / ec->samples_per_segment; pj_assert(N>0); Do you have an idea where is the problem ? Do you have an idea how to resolve this issue ? Thanks in advance. Samuel