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>I remember?I had to expose the echo cancelation level implementing a get_echo_level( ) function based on this: >http://lists.xiph.org/pipermail/speex-dev/2008-September/006889.html This is really a good idea to determine the frequency difference between capture and play of the sound card. But it need constant far-end voice and a long time because it must repeat the process of "resampling, test echo" for many times. Have you tried the AEC in DirectSound? If th...

...ic echo >Para: speex-dev at xiph.org, p_j_r_m at yahoo.com >Fecha: viernes, 23 de julio, 2010 22:42 > > >>I remember?I had to expose the echo cancelation level implementing a get_echo_level( ) function based on this: >>http://lists.xiph.org/pipermail/speex-dev/2008-September/006889.html > >This is really a good idea to determine the frequency difference between capture >and play of the sound card. But it need constant far-end voice and a long time >because it must repeat the process of "resampling, test echo" for many times. > >Have you tried the A...

Hi ? I used this "sample counting " method to?resample and put my audio signals in synch. It worked perfectly?in XP machines using a SoundMax?audio card, but it failed in other XPs using Realtek cards. As seen on http://lists.xiph.org/pipermail/speex-dev/2008-September/006889.html?my application?continously checked my AEC level to slighly modify resample frequency, but convergence was impossible with?that audio?cards. Then, I used ASIO (through port-audio library) in those machines, and?AEC worked again. But this solution wasn?t practical (user?must install a special dr...

Thank you. But it will cost you a long time to get the accurate play and capture frequencies. Does your program test two frequencies of the sound card each time? Because different sound cards have different frequency errors. And the resampling program is also time consuming because the target frequency is so close to the sampling frequency of the input signal, isn't it? I have tested program

...com> >> >Fecha: viernes, 23 de julio, 2010 22:42 >> > >> > >> >>I remember?I had to expose the echo cancelation level implementing a >> get_echo_level( ) function based on this: >> >>http://lists.xiph.org/pipermail/speex-dev/2008-September/006889.html >> > >> >This is really a good idea to determine the frequency difference >> between capture >> >and play of the sound card. But it need constant far-end voice and a >> long time >> >because it must repeat the process of "resampling, test ec...