Remote participant hears their own voice echoed back from Samsung A22 and so many other devices host mic even with VOICE_COMMUNICATION, AEC, MODE_IN_COMMUNICATION enabled

[JaydipMGodhani]

I am facing a persistent echo/double-voice issue on Android with LiveKit.

When a Samsung A22 device joins a LiveKit room as host/co-host with microphone enabled, and another participant speaks, the remote participant hears their own voice coming back from the Samsung A22 host. The LiveKit active speaker indicator also shows the Samsung A22 host as speaking when the remote participant is talking.

If I mute the Samsung A22 host microphone, the double voice immediately stops.

This confirms the remote participant’s audio is being captured by the Samsung A22 microphone and published back into the LiveKit room.

Device

• Device: Samsung Galaxy A22
• Model: SM-A225F
• Android SDK: 33
• Audio route: Built-in speaker
• Input device: Built-in mic

Issue behavior

Actual behavior

1. Host joins room from Samsung A22.
2. Host microphone is enabled.
3. Remote user joins same room.
4. Remote user speaks.
5. Remote user hears their own voice again from the host side.
6. LiveKit active speaker indicator shows host speaking, even though host is silent.
7. If host mic is muted, echo/double voice stops.

Expected behavior

When remote user speaks, the Samsung A22 host microphone should not publish the remote user’s speaker audio back into the room. Acoustic echo cancellation should remove the far-end audio from the host microphone capture.

Confirmed logs

Audio route and capture source appear correct.

BEFORE_LIVEKIT_CREATE wait#1 -> mode=3, currentType=2, name=SM-A225F
AFTER_LIVEKIT_CREATE_BEFORE_CONNECT wait#0 -> mode=3, currentType=2, name=SM-A225F
AFTER_CONNECT_BEFORE_MIC wait#0 -> mode=3, currentType=2, name=SM-A225F
AFTER_MIC_ENABLE wait#0 -> mode=3, currentType=2, name=SM-A225F

[JaydipMGodhani]

I am getting below error on some devices which is not work.

set(): AudioFlinger could not create effect 7b491460-8d4d-11e0-bd61-0002a5d5c51b / ec7178ec-e5e1-4432-a3f4-4657e6795210, status: -19
AudioEffect initCheck failed -3
Error code -3 when initializing AudioEffect.