This app was mentioned in 8 comments, with an average of 1.50 upvotes
You probably want something like sound Seeder. https://play.google.com/store/apps/details?id=com.kattwinkel.android.soundseeder.player
Amp me is another app. https://play.google.com/store/apps/details?id=com.amp.android
Try Soundseeder. Supports local files and more https://play.google.com/store/apps/details?id=com.kattwinkel.android.soundseeder.player
*Forgot to mention, the free version only supports 15 mins of playback. The pro version doesn't have this limitation
Not exactly a Bluetooth connection.
But sound wire should be suitable for ur requirement.
Linkme: sound wire
Edit : this should work https://play.google.com/store/apps/details?id=com.kattwinkel.android.soundseeder.player
Yep, only the source phone needs root. The destination phone can use any UPnP style receiver such as SoundSeeder, AllConnect, Bubble UPnP to name a few.
Soundseeder for Android works well. The radio stations dont work but all your playlists will.
https://play.google.com/store/apps/details?id=com.kattwinkel.android.soundseeder.player