Unable to switch from speakerphone to earpiece back once switched to speakerphone

[CERCLEME]

Hi,

I would need to know if it is possible in chrome that we can switch between earpiece and speakerphone while streaming call. I have tried many approaches to fulfill it but could not do that.

I am able to set earpiece to srcObject of audio element. when call starts, I enumerate devices and take earpiece id and set streaming of remote audio to audio input by getUserMedia and options with {audio:{ deviceId: earpieceId } .It is working fine when in between the call, I switch from earpiece to speaker, It also works fine. But when I again switching back to earpiece, It does not work.

Can some one help me on this ?
Thanks,
Kartik