Hello everyone, I followed the Linphone audio tuning guide (https://wiki.linphone.org/xwiki/wiki/public/view/Lib/Features/Audio%20tuning/) to determine the appropriate value for ec_delay. I ran the test tool (https://gitlab.linphone.org/BC/public/liblinphone/-/blob/master/tools/test_ecc.c) and I also ran the test tool inside my own project (to ensure that the API functions were using my project's configuration).
In both cases, the results indicated around 60ms for ec_delay, but when testing a Linphone call with "ec_delay=60", it doesn't work at all. I tried to adjust the ec_delay manually and it turns out that the value that completely removes the echo is 110ms. I can't explain why the 60ms returned by the test_ecc tool doesn't work while 110ms works well. Could you please explain to me the difference between the theoretical ec_delay (60) and the practical ec_delay (110) I found ? Do you know if there is another test or tool that could help me determine the correct ec_delay programmatically? Thank you, Have a nice day, Fabien
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