Search code examples
androidpjsipcsip-simple

how to reduce echo/noise in PJSIP android application when turn on speaker

I have a PJSIP library used in my android based csipsimple application. Everything is working fine except one issue. When i turn on speaker there are lots of echo/noise in the call and it impossible to have conversation. What could be an issue and how to deals with this?

Solution

  • A simple google search returns the XDA thread which says the possible cause and the solution.

    I quote the answer given by gtj0

    In CSipSimple, go to Settings, press the Menu button and set Expert Mode. Then in Settings, Media...set

    • Echo cancellation on
    • Echo mode to WebRTC
    • Noise reduction on
    • Clock rate to 16khz

    Scroll to the bottom and select Audio troubleshooting then set

    • Use WebRTC implementation on
    • Restart stream when change routing on
    • Audio implementation to OpenSL-ES

    You can also try different settings for Audio mode for SIP calls. IN_CALL seems to work for me.

    Hope this helps.