[Speex-dev] problems with echo cancellation filter

[hs]

Hi!

there are some problems with echo cancellation filter from speex.

problem 1:

some noises, echo is removed, but sometimes you can hear some noises  
instead of echo.
I was trying with many different parameters for buffer length (40ms and  
20ms), filter length (from 100ms to 4s) and echo tail (2 to 5 buffers),  
but could not find the right setting.

problem 2:

it happens that the filter suddenly stops working and returns silence, so  
you don't hear anything.

any ideas how to cope with this problems?

regards
hs