[SOLVED] WebRTC echo issues in Samsung S10, S21Ultra

WebRTC echo issues in Samsung S10, S21Ultra

We have an application which connects patient to doctor, doctor app is built on react, and patient app is build on Android.

I am using OPUS as audio codec, and VP8 as video Codec in our webRtc based application, but there is an echo issues 100% of the time in Samsung devices S10, S21 Ultra and having Android 11+.

By Echo I mean:

Doctor can hear his/her own voice back.

I have tried following:

            WebRtcAudioUtils.setWebRtcBasedAcousticEchoCanceler(true);
            WebRtcAudioUtils.setWebRtcBasedNoiseSuppressor(true);

Also, also set the audio manager mode to "MODE_IN_COMMUNICATION"

            audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);

Is ther anything to do with SDP manipulation? or is this a known bug in Samsung new devices?

Solution

So apparently echo issue is resolved by using the 3 flags below and "MODE_IN_COMMUNICATION"

Tested on Samsung S21 Ultra.

        WebRtcAudioUtils.setWebRtcBasedAcousticEchoCanceler(true);
        WebRtcAudioUtils.setWebRtcBasedAutomaticGainControl(true);
        WebRtcAudioUtils.setWebRtcBasedNoiseSuppressor(true);


        // Audio Manager
        audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);