which is good WebRtc or wifi P2P to share audio from one device to another device

I have music player and need to add sync play functionality with other mobile for example if 2 or more users are using my music player and want to play same song on all devices then they just connect through same network and can play music on all devices from one device with complete music player control of all devices on single device.

can anyone explain me which is best and how can i share audio from one android device to another device on Sync and what are the steps to do so

I don't know why i am getting down votes i need clarification and help so i am asking this. and this is the best site for asking this development question

Points i know about WiFi P2P-

• create connection

• create socket for sharing

• share a complete file

Points i want to know:-

• How can i share file without storing in another device storage.

• How to play sound on both devices at same position (ON SYNC).

and after Wifi P2P i want to say that i don't know about WebRTC like:- * How it works?

• How to setup connection for this ?

• Is it always required internet connection ?

• Is same application is required in both devices to create connection between devices?

please help to understand this.....

Thanks

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