why is my back speaker not working while playing music

[Mani Kanth Reddy]

when iam taking a call then I can able to turn on the back speaker and its working but when iam playing music it playing in front speaker( call listening speaker), can any one help me plzzz(Samsung s4)

 

[B. Diddy]

Welcome to Android Central! Which phone? (EDIT: OP subsequently edited to include phone)

 

[Mani Kanth Reddy]

can u plzz help me...

 

[B. Diddy]

What app are you using to play music? Does this persist after a reboot? Does it happen in Safe Mode? https://support.t-mobile.com/docs/DOC-11724