Use Bluetooth speaker to play music

Hey Guys! I have bluetooth speaker Divoom OnBeat 500. It perfectly connects to my Meizu M2 and work as speaker during calls but how can I select it to play sound from apps? It uses built in speaker even if bluetooth speaker is connected.
P.S. It perfectly worked on android 4.4 on another phone. Thanks!

Well, I cannot exactly clearify it now, since I don’t use a Meizu atm. But in the native Music player when you are at music play screen, there is an option menu where you can select your playback device. I don’t know how it works for other apps.

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