Me again. After digging for a while in android forums, I still cannot get echo cancellation to work. I keep getting "Attempt to invoke virtual method 'int android.media.audiofx.AcousticEchoCanceler.setEnabled(boolean)' on a null object reference".

Thank you very much. The problem was (as you correctly guessed) the soundcard mic settings. Now I have to take the time to explore this in Android.

Thanks again.

Thanks, toxonic and ddw_music, I'll take a look at that.

Maybe I'm pushing the mic too much. This is a smaple of what I hear: dist.wav

Thanks for the disposition. Here it goes:
belting10.pd

I get the same problem when running the patch in PD.

I get the type of distorsion you get when you either speak too close to the microphone or when there's a damaged cone; sort of a buzz.

Yes, me again. I'm trying to develop an app that will allow my students (I teach Phonetics) to listen to their own pronunciation in real-time (it's not as silly as it sounds; we don't hear our own voice the way it really is). I have encountered two problems, 1) there is some delay (small, but big enough to bother) between the input and the output, 2) I get a lot of distorsion. As for the latter, I've tried using [clip~] but it didn't really solve the problem. Keep in mind I have used the same microphone (headset) to record on the phone and I get no distorsion at all. Any thoughts?

I wanted you to know, whale-av and Jona, that I finally got it working, so thank you very much for your help.

Thank you very much! I will try that.