is there means to turn on echo cancellation?

[juha-h]

Issue juha-h/baresip-studio#3 was opened on my baresip-studio project regarding echo cancellation on Android. I vaguely remember that this has been discussed earlier, but could not find a trace. What are the options? I have seen mentioned Speex AEC, GStreamer, and somehow attaching Android AudioManager to the audio session.

[alfredh]

the best would be if Android has Hardware AEC. does anyone know if this is supported
by Android SW and/or HW ?

you can try the speex_aec module (Software AEC) but most likely it will not work
very well.

we should create a new module e.g. "webrtc_aec" that is using the AEC apis
from the Webrtc native project. This one has high quality AEC processing:

https://webrtc.googlesource.com/src/+/master/modules/audio_processing/aec3/

Alfred

[juha-h]

Alfred E. Heggestad writes:

the best would be if Android has Hardware AEC. does anyone know if this is supported by Android SW and/or HW ?

In Android API there is function to check if device implements AEC: https://developer.android.com/reference/android/media/audiofx/AcousticEchoCanceler#isAvailable() I guess it means hw AEC. In order to use it, audioSession id is needed.

we should create a new module e.g. "webrtc_aec" that is using the AEC apis from the Webrtc native project. This one has high quality AEC processing.

Sounds like a good option.

…

-- Juha

[juha-h]

There is some info about webrtc AEC native implementations on the web, e.g.

• https://stackoverflow.com/questions/12818721/webrtc-aec-on-android#14692832
• https://github.com/ThePacific/webrtc-android-jni

Also pjsip lib includes webrtc AEC:

• https://trac.pjsip.org/repos/ticket/1888

I'll add enhancement (feature request) label to this issue.

[henriz]

This might be a bit late, but you can use pulse, and in pulse configure the webrtc arc module. This works fine.

[juha-h]

@henriz Are you suggesting to use baresip pulse module in Android or something else?