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Note: Version of android referenced below is 4.1 (JellyBean) The response is probably too late. However, for anyone interested in answers to dbaustista's questions, consider following: AEC is modeled by AudioEffect class. So, an AEC AudioEffect object needs to be added to the "effects-chain" of the RecordThread. I believe the implementation of AEC is built into the <code>libaudioprocessing</code> library. See additional notes below. Library <pre><code>/system/etc/audio_effects.conf libraries { ... pre_processing { path /system/lib/soundfx/libaudiopreprocessing.so } } </code></pre> Interface <pre><code>media/AudioEffect.h </code></pre> Example The example below shows you how to add an AudioEffect object to a PlaybackThread. Apply similar logic to the RecordThread i.e. Add the AEC object to the effects-chain of the RecordThread. mediaframeworktest/functional/audio/MediaAudioEffectTest.java <pre><code> AudioTrack track = new AudioTrack( AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT, AudioTrack.getMinBufferSize(44100, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT), AudioTrack.MODE_STREAM); assertNotNull(msg + ": could not create AudioTrack", track); AudioEffect effect = new AudioEffect(AudioEffect.EFFECT_TYPE_ENV_REVERB, AudioEffect.EFFECT_TYPE_NULL, 0, 0); track.attachAuxEffect(effect.getId()); track.setAuxEffectSendLevel(1.0f); </code></pre> AEC Config Options TODO: add example configuration of AEC
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1. POWebRTC AEC on Android
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1. USKeo Malope
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1. COI never got Speex Echo Cancellation working very well (lot's of noise). See my answer on how to include the AEC from WebRTC.
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2. COThanks. Side note: SSE2 is for x86 architectures. If working on ARM based platform, you'd have to use aec"m" source files. Better still, you could link against the already integrated "libaudiopreprocessing"
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