can i stream mp3 music via bluetooth

[AC Question]

i have a samsung galaxy discovery [CRICKET} AND I WANT TO STREAM MUSIC FROM MY ANDROID 4.1.2 via bluetooth to a fm transmitter to play music in car. My phone wont switch off the speaker and i dont get any sound. the hands free function works over the radio/bluetooth transmitter. Do i need a special mp3 player app to stream via bluetooth?
Chuck

 

[B. Diddy]

What Bluetooth transmitter are you using? Is it properly paired with the phone? Go to Settings>Bluetooth, tap the device's name, and make sure "Media audio" is checked on.